diff --git a/index.css b/index.css
index 307dabb1..a552c8d4 100644
--- a/index.css
+++ b/index.css
@@ -195,13 +195,13 @@ i.icon-lock {
 	font-size: 12px;
 }
 
-#religionHierarchy .selected {
+#hierarchy .selected {
 	stroke: #c13119;
 	stroke-width: 1;
 	cursor: move;
 }
 
-#religionHierarchy text,
+#hierarchy text,
 #statesTree text,
 #provincesTree text {
 	pointer-events: none;
diff --git a/index.html b/index.html
index 07f3b75e..fc56ddb0 100644
--- a/index.html
+++ b/index.html
@@ -952,7 +952,7 @@
           <option value="styleDefault" data-system=1 selected>Default</option>
           <option value="styleGloom" data-system=1>Gloom</option>
           <option value="styleAncient" data-system=1>Ancient</option>
-          <option value="styleMonochrome" data-system=1>Monochrome</option>
+          <option value="styleMonochrome" data-system=1>Monochrome (for heightmap)</option>
           <option value="styleClean" data-system=1>Clean</option>
         </select>
         <button id="addStyleButton" data-tip="Click to save current style as a new preset" class="icon-plus styleButton" style="display: inline-block" onclick="addStylePreset()"></button>
@@ -1793,8 +1793,8 @@
           <button id="regenerateStates" data-tip="Click to select new capitals and regenerate states. Burgs will remain as they are">States</button>
           <button id="regenerateProvinces" data-tip="Click to regenerate provinces. States will remain as they are">Provinces</button>
           <button id="regenerateReligions" data-tip="Click to regenerate religions">Religions</button>
-          <button id="regenerateMarkers" data-tip="Click to regenerate markers">Markers</button>
-          <button id="regenerateZones" data-tip="Click to regenerate zones">Zones</button>
+          <button id="regenerateMarkers" data-tip="Click to regenerate markers. Hold Ctrl and click to set markers number multiplier">Markers</button>
+          <button id="regenerateZones" data-tip="Click to regenerate zones. Hold Ctrl and click to set zones number multiplier">Zones</button>
         </div>
 
         <div id="addFeature">
@@ -1880,7 +1880,8 @@
           Sasquatch, Shawn Spencer, Sizz_TV, Timothée CALLET, UTG community, Vlad Tomash, Wil Sisney, William Merriott, Xariun,
           Gun Metal Games, Scott Marner, Spencer Sherman, Valerii Matskevych, Alloyed Clavicle, Stewart Walsh, Ruthlyn Mollett (Javan),
           Benjamin Mair-Pratt, Diagonath, Alexander Thomas, Ashley Wilson-Savoury, William Henry, Preston Brooks, JOSHUA QUALTIERI,
-          Hilton Williams, Katharina Haase, Hisham Bedri, Ian arless, Karnat, Bird, Kevin and many others!</p>
+          Hilton Williams, Katharina Haase, Hisham Bedri, Ian arless, Karnat, Bird, Kevin, Jessica Thomas, Steve Hyatt, Logicspren, 
+          Alfred García, Jonathan Killstring, John Ackley, Invad3r233, Norbert Žigmund, Jennifer, PoliticsBuff and many others!</p>
 
         <ul class="share-buttons">
           <li><a href="https://www.facebook.com/sharer/sharer.php?u=https%3A%2F%2Fazgaar.github.io%2FFantasy-Map-Generator%2F&quote=" data-tip="Share on Facebook" target="_blank"><img alt="Share on Facebook" src="images/Facebook.png" /></a></li>
@@ -2891,6 +2892,7 @@
         <button id="culturesEditStyle" data-tip="Edit cultures style in Style Editor" class="icon-adjust"></button>
         <button id="culturesLegend" data-tip="Toggle Legend box" class="icon-list-bullet"></button>
         <button id="culturesPercentage" data-tip="Toggle percentage / absolute values display mode" class="icon-percent"></button>
+        <button id="culturesHeirarchy" data-tip="Show cultures hierarchy tree" class="icon-sitemap"></button>
         <button id="culturesManually" data-tip="Manually re-assign cultures" class="icon-brush"></button>
         <div id="culturesManuallyButtons" style="display: none">
           <label data-tip="Change brush size. Shortcut: + (increase), – (decrease)" class="italic">Brush size:
diff --git a/main.js b/main.js
index 102ddc80..04813fa9 100644
--- a/main.js
+++ b/main.js
@@ -1136,6 +1136,7 @@ function rankCells() {
 
 // generate some markers
 function addMarkers(number = 1) {
+  if (!number) return;
   console.time("addMarkers");
   const cells = pack.cells;
 
diff --git a/modules/cultures-generator.js b/modules/cultures-generator.js
index 04c26e71..386ccc62 100644
--- a/modules/cultures-generator.js
+++ b/modules/cultures-generator.js
@@ -38,25 +38,28 @@
       }
     }
 
-    pack.cultures = getRandomCultures(count);
+    const cultures = pack.cultures = getRandomCultures(count);
     const centers = d3.quadtree();
     const colors = getColors(count);
 
-    pack.cultures.forEach(function(culture, i) {
+    cultures.forEach(function(culture, i) {
       const c = culture.center = placeCultureCenter();
       centers.add(cells.p[c]);
       culture.i = i+1;
+      delete culture.odd;
       culture.color = colors[i];
       culture.type = defineCultureType(c);
       culture.expansionism = defineCultureExpansionism(culture.type);
+      culture.origin = 0;
+      culture.code = getCode(culture.name);
       cells.culture[c] = i+1;
     });
 
     // the first culture with id 0 is for wildlands
-    pack.cultures.unshift({name:"Wildlands", i:0, base:1});
+    cultures.unshift({name:"Wildlands", i:0, base:1, origin:null});
 
     // check whether all bases are valid. If not, load default namesbase
-    const invalidBase = pack.cultures.some(c => !nameBases[c.base]);
+    const invalidBase = cultures.some(c => !nameBases[c.base]);
     if (invalidBase) nameBases = Names.getNameBases();
 
     function getRandomCultures(c) {
@@ -111,6 +114,36 @@
     console.timeEnd('generateCultures');
   }
 
+  // assign a unique two-letters code (abbreviation)
+  function getCode(name) {
+    const words = name.split(" "), letters = words.join("");
+    let code = words.length === 2 ? words[0][0]+words[1][0] : letters.slice(0,2);
+    for (let i=1; i < letters.length-1 && pack.cultures.some(c => c.code === code); i++) {
+      code = letters[0] + letters[i].toUpperCase();
+    }
+    return code;
+  }
+
+  const add = function(center) {
+    const defaultCultures = getDefault();
+    let culture, base, name;
+    if (pack.cultures.length < defaultCultures.length) {
+      // add one of the default cultures
+      culture = pack.cultures.length;
+      base = defaultCultures[culture].base;
+      name = defaultCultures[culture].name;
+    } else {
+      // add random culture besed on one of the current ones
+      culture = rand(pack.cultures.length - 1);
+      name = Names.getCulture(culture, 5, 8, "");
+      base = pack.cultures[culture].base;
+    }
+    const code = getCode(name);
+    const i = pack.cultures.length;
+    const color = d3.color(d3.scaleSequential(d3.interpolateRainbow)(Math.random())).hex();
+    pack.cultures.push({name, color, base, center, i, expansionism:1, type:"Generic", cells:0, area:0, rural:0, urban:0, origin:0, code});
+  }
+
   const getDefault = function(count) {
     if (culturesSet.value === "european") {
       return [
@@ -391,6 +424,6 @@
     return 0;
   }
 
-  return {generate, expand, getDefault};
+  return {generate, add, expand, getDefault};
 
 })));
diff --git a/modules/save-and-load.js b/modules/save-and-load.js
index 5576de55..ac2946f7 100644
--- a/modules/save-and-load.js
+++ b/modules/save-and-load.js
@@ -830,6 +830,14 @@ function parseLoadedData(data) {
         terrs.attr("scheme", "bright").attr("terracing", 0).attr("skip", 5).attr("relax", 0).attr("curve", 0);
         svg.select("#oceanic > rect").attr("id", "oceanicPattern");
         oceanLayers.attr("layers", "-6,-3,-1");
+
+        // v 1.1 added cultures heirarchy tree
+        if (pack.cultures[1] && !pack.cultures[1].code) {
+          pack.cultures.filter(c => c.i).forEach(c => {
+            c.origin = 0;
+            c.code = c.name.slice(0, 2);
+          });
+        }
       }
 
     }()
diff --git a/modules/ui/burg-editor.js b/modules/ui/burg-editor.js
index 50fa645c..05699af4 100644
--- a/modules/ui/burg-editor.js
+++ b/modules/ui/burg-editor.js
@@ -287,7 +287,7 @@ function editBurg(id) {
       const newSeed = prompt(`Please provide a Medieval Fantasy City Generator seed. `+ 
         `Seed should be a number. Default seed is FMG map seed + burg id padded to 4 chars with zeros (${defSeed}). `+
         `Please note that if seed is custom, "Overworld" button from MFCG will open a different map`, burg.MFCG || defSeed);
-      if (newSeed && newSeed != defSeed) burg.MFCG = newSeed; else return;
+      if (newSeed) burg.MFCG = newSeed; else return;
     }
 
     const name = elSelected.text();
@@ -309,7 +309,7 @@ function editBurg(id) {
     openURL(url);
   }
 
-  function openInIAHG() {
+  function openInIAHG(event) {
     const id = elSelected.attr("data-id");
     const burg = pack.burgs[id];
     const defSeed = `${seed}-b${id}`;
@@ -317,7 +317,7 @@ function editBurg(id) {
     if (event.ctrlKey) {
       const newSeed = prompt(`Please provide an Iron Arachne Heraldry Generator seed. `+ 
         `Default seed is a combination of FMG map seed and burg id (${defSeed})`, burg.IAHG || defSeed);
-      if (newSeed && newSeed != defSeed) burg.IAHG = newSeed; else return;
+      if (newSeed) burg.IAHG = newSeed; else return;
     }
 
     const s = burg.IAHG || defSeed;
diff --git a/modules/ui/cultures-editor.js b/modules/ui/cultures-editor.js
index 046f6078..81f4eeee 100644
--- a/modules/ui/cultures-editor.js
+++ b/modules/ui/cultures-editor.js
@@ -25,6 +25,7 @@ function editCultures() {
   document.getElementById("culturesEditStyle").addEventListener("click", () => editStyle("cults"));
   document.getElementById("culturesLegend").addEventListener("click", toggleLegend);
   document.getElementById("culturesPercentage").addEventListener("click", togglePercentageMode);
+  document.getElementById("culturesHeirarchy").addEventListener("click", showHierarchy);
   document.getElementById("culturesRecalculate").addEventListener("click", () => recalculateCultures(true));
   document.getElementById("culturesManually").addEventListener("click", enterCultureManualAssignent);
   document.getElementById("culturesManuallyApply").addEventListener("click", applyCultureManualAssignent);
@@ -148,17 +149,35 @@ function editCultures() {
   }
  
   function cultureHighlightOn(event) {
+    const culture = +event.target.dataset.id;
+    const info = document.getElementById("cultureInfo");
+    if (info) {
+      d3.select("#hierarchy").select("g[data-id='"+culture+"'] > path").classed("selected", 1);
+      const c = pack.cultures[culture];
+      const rural = c.rural * populationRate.value;
+      const urban = c.urban * populationRate.value * urbanization.value;
+      const population = rural + urban > 0 ? si(rn(rural + urban)) + " people" : "Extinct";
+      info.innerHTML = `${c.name} culture. ${c.type}. ${population}`;
+      tip("Drag to change parent, drag to itself to move to the top level. Hold CTRL and click to change abbreviation");
+    }
+
     if (!layerIsOn("toggleCultures")) return;
     if (customization) return;
-    const culture = +event.target.dataset.id;
     const animate = d3.transition().duration(2000).ease(d3.easeSinIn);
     cults.select("#culture"+culture).raise().transition(animate).attr("stroke-width", 2.5).attr("stroke", "#d0240f");
     debug.select("#cultureCenter"+culture).raise().transition(animate).attr("r", 8).attr("stroke", "#d0240f");
   }
 
   function cultureHighlightOff(event) {
-    if (!layerIsOn("toggleCultures")) return;
     const culture = +event.target.dataset.id;
+    const info = document.getElementById("cultureInfo");
+    if (info) {
+      d3.select("#hierarchy").select("g[data-id='"+culture+"'] > path").classed("selected", 0);
+      info.innerHTML = "&#8205;";
+      tip("");
+    }
+
+    if (!layerIsOn("toggleCultures")) return;
     cults.select("#culture"+culture).transition().attr("stroke-width", null).attr("stroke", null);
     debug.select("#cultureCenter"+culture).transition().attr("r", 6).attr("stroke", null);
   }
@@ -340,6 +359,99 @@ function editCultures() {
     }
   }
 
+  function showHierarchy() {
+    // build hierarchy tree
+    pack.cultures[0].origin = null;
+    const cultures = pack.cultures.filter(c => !c.removed);
+    const root = d3.stratify().id(d => d.i).parentId(d => d.origin)(cultures);
+    const treeWidth = root.leaves().length;
+    const treeHeight = root.height;
+    const width = treeWidth * 40, height = treeHeight * 60;
+
+    const margin = {top: 10, right: 10, bottom: -5, left: 10};
+    const w = width - margin.left - margin.right;
+    const h = height + 30 - margin.top - margin.bottom;
+    const treeLayout = d3.tree().size([w, h]);
+
+    // prepare svg
+    alertMessage.innerHTML = "<div id='cultureInfo' class='chartInfo'>&#8205;</div>";
+    const svg = d3.select("#alertMessage").insert("svg", "#cultureInfo").attr("id", "hierarchy")
+      .attr("width", width).attr("height", height).style("text-anchor", "middle");
+    const graph = svg.append("g").attr("transform", `translate(10, -45)`);
+    const links = graph.append("g").attr("fill", "none").attr("stroke", "#aaaaaa");
+    const nodes = graph.append("g");
+
+    renderTree();
+    function renderTree() {
+      treeLayout(root);
+      links.selectAll('path').data(root.links()).enter()
+        .append('path').attr("d", d => {return "M" + d.source.x + "," + d.source.y
+          + "C" + d.source.x + "," + (d.source.y * 3 + d.target.y) / 4
+          + " " + d.target.x + "," + (d.source.y * 2 + d.target.y) / 3
+          + " " + d.target.x + "," + d.target.y;});
+
+      const node = nodes.selectAll('g').data(root.descendants()).enter()
+        .append('g').attr("data-id", d => d.data.i).attr("stroke", "#333333")
+        .attr("transform", d => `translate(${d.x}, ${d.y})`)
+        .on("mouseenter", () => cultureHighlightOn(event))
+        .on("mouseleave", () => cultureHighlightOff(event))
+        .call(d3.drag().on("start", d => dragToReorigin(d)));
+
+      node.append("path").attr("d", d => {
+        if (!d.data.i) return "M5,0A5,5,0,1,1,-5,0A5,5,0,1,1,5,0"; else // small circle
+        if (d.data.type === "Generic") return "M11.3,0A11.3,11.3,0,1,1,-11.3,0A11.3,11.3,0,1,1,11.3,0"; else // circle
+        if (d.data.type === "River") return "M0,-14L14,0L0,14L-14,0Z"; else // diamond
+        if (d.data.type === "Lake") return "M-6.5,-11.26l13,0l6.5,11.26l-6.5,11.26l-13,0l-6.5,-11.26Z"; else // hexagon
+        if (d.data.type === "Naval") return "M-11,-11h22v22h-22Z"; // square
+        if (d.data.type === "Highland") return "M-11,-11l11,2l11,-2l-2,11l2,11l-11,-2l-11,2l2,-11Z"; // concave square
+        if (d.data.type === "Nomadic") return "M-4.97,-12.01 l9.95,0 l7.04,7.04 l0,9.95 l-7.04,7.04 l-9.95,0 l-7.04,-7.04 l0,-9.95Z"; // octagon
+        if (d.data.type === "Hunting") return "M0,-14l14,11l-6,14h-16l-6,-14Z"; // pentagon
+        return "M-11,-11h22v22h-22Z"; // square
+      }).attr("fill", d => d.data.i ? d.data.color : "#ffffff")
+        .attr("stroke-dasharray", d => d.data.cells ? "null" : "1");
+
+      node.append("text").attr("dy", ".35em").text(d => d.data.i ? d.data.code : '');
+    }
+
+    $("#alert").dialog({
+      title: "Cultures tree", width: fitContent(), resizable: false, 
+      position: {my: "left center", at: "left+10 center", of: "svg"}, buttons: {},
+      close: () => {alertMessage.innerHTML = "";}
+    });
+
+    function dragToReorigin(d) {
+      if (d3.event.sourceEvent.ctrlKey) {changeCode(d); return;}
+
+      const originLine = graph.append("path")
+        .attr("class", "dragLine").attr("d", `M${d.x},${d.y}L${d.x},${d.y}`);
+
+      d3.event.on("drag", () => {
+        originLine.attr("d", `M${d.x},${d.y}L${d3.event.x},${d3.event.y}`)
+      });
+
+      d3.event.on("end", () => {
+        originLine.remove();
+        const selected = graph.select("path.selected");
+        if (!selected.size()) return;
+        const culture = d.data.i;
+        const oldOrigin = d.data.origin;
+        let newOrigin = selected.datum().data.i;
+        if (newOrigin == oldOrigin) return; // already a child of the selected node
+        if (newOrigin == culture) newOrigin = 0; // move to top
+        if (newOrigin && d.descendants().some(node => node.id == newOrigin)) return; // cannot be a child of its own child
+        pack.cultures[culture].origin = d.data.origin = newOrigin; // change data
+        showHierarchy() // update hierarchy
+      });
+    }
+
+    function changeCode(d) {
+      const code = prompt(`Please provide an abbreviation for culture: ${d.data.name}`, d.data.code);
+      if (!code) return;
+      pack.cultures[d.data.i].code = code;
+      nodes.select("g[data-id='"+d.data.i+"']").select("text").text(code);
+    }
+  }
+
   // re-calculate cultures
   function recalculateCultures(must) {
     if (!must && !culturesAutoChange.checked) return;
@@ -499,23 +611,8 @@ function editCultures() {
     if (occupied) {tip("This cell is already a culture center. Please select a different cell", false, "error"); return;}
 
     if (d3.event.shiftKey === false) exitAddCultureMode();
+    Cultures.add(center);
 
-    const defaultCultures = Cultures.getDefault();
-    let culture, base, name;
-    if (pack.cultures.length < defaultCultures.length) {
-      // add one of the default cultures
-      culture = pack.cultures.length;
-      base = defaultCultures[culture].base;
-      name = defaultCultures[culture].name;
-    } else {
-      // add random culture besed on one of the current ones
-      culture = rand(pack.cultures.length - 1);
-      name = Names.getCulture(culture, 5, 8, "");
-      base = pack.cultures[culture].base;
-    }
-    const i = pack.cultures.length;
-    const color = d3.color(d3.scaleSequential(d3.interpolateRainbow)(Math.random())).hex();
-    pack.cultures.push({name, color, base, center, i, expansionism:1, type:"Generic", cells:0, area:0, rural:0, urban:0});
     drawCultureCenters();
     culturesEditorAddLines();
   }
diff --git a/modules/ui/religions-editor.js b/modules/ui/religions-editor.js
index 297b9b99..4add348b 100644
--- a/modules/ui/religions-editor.js
+++ b/modules/ui/religions-editor.js
@@ -143,7 +143,7 @@ function editReligions() {
     const religion = +event.target.dataset.id;
     const info = document.getElementById("religionInfo");
     if (info) {
-      d3.select("#religionHierarchy").select("g[data-id='"+religion+"'] > path").classed("selected", 1);
+      d3.select("#hierarchy").select("g[data-id='"+religion+"'] > path").classed("selected", 1);
       const r = pack.religions[religion];
       const type = r.name.includes(r.type) ? "" 
         : r.type === "Folk" || r.type === "Organized" 
@@ -153,7 +153,7 @@ function editReligions() {
       const urban = r.urban * populationRate.value * urbanization.value;
       const population = rural + urban > 0 ? ". " + si(rn(rural + urban)) + " believers" : ". Extinct";
       info.innerHTML = `${r.name}${type}${form}${population}`;
-      tip("Drag to change parent. Hold CTRL and click to change abbreviation");
+      tip("Drag to change parent, drag to itself to move to the top level. Hold CTRL and click to change abbreviation");
     }
 
     const el = body.querySelector(`div[data-id='${religion}']`);
@@ -169,7 +169,7 @@ function editReligions() {
     const religion = +event.target.dataset.id;
     const info = document.getElementById("religionInfo");
     if (info) {
-      d3.select("#religionHierarchy").select("g[data-id='"+religion+"'] > path").classed("selected", 0);
+      d3.select("#hierarchy").select("g[data-id='"+religion+"'] > path").classed("selected", 0);
       info.innerHTML = "&#8205;";
       tip("");
     }
@@ -372,7 +372,7 @@ function editReligions() {
 
     // prepare svg
     alertMessage.innerHTML = "<div id='religionInfo' class='chartInfo'>&#8205;</div>";
-    const svg = d3.select("#alertMessage").insert("svg", "#religionInfo").attr("id", "religionHierarchy")
+    const svg = d3.select("#alertMessage").insert("svg", "#religionInfo").attr("id", "hierarchy")
       .attr("width", width).attr("height", height).style("text-anchor", "middle");
     const graph = svg.append("g").attr("transform", `translate(10, -45)`);
     const links = graph.append("g").attr("fill", "none").attr("stroke", "#aaaaaa");
@@ -413,7 +413,7 @@ function editReligions() {
     });
 
     function dragToReorigin(d) {
-      if (d3.event.sourceEvent.ctrlKey) {changeReligionCode(d); return;}
+      if (d3.event.sourceEvent.ctrlKey) {changeCode(d); return;}
 
       const originLine = graph.append("path")
         .attr("class", "dragLine").attr("d", `M${d.x},${d.y}L${d.x},${d.y}`);
@@ -437,7 +437,7 @@ function editReligions() {
       });
     }
 
-    function changeReligionCode(d) {
+    function changeCode(d) {
       const code = prompt(`Please provide an abbreviation for ${d.data.name}`, d.data.code);
       if (!code) return;
       pack.religions[d.data.i].code = code;
diff --git a/modules/ui/style.js b/modules/ui/style.js
index 4dc5331b..88fd0bcd 100644
--- a/modules/ui/style.js
+++ b/modules/ui/style.js
@@ -681,7 +681,7 @@ function addDefaulsStyles() {
   }
 
   if (!localStorage.getItem("styleMonochrome")) {
-    const monochrome = 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+    const monochrome = `{"#map":{"background-color":"#000000","filter":"url(#filter-grayscale)","data-filter":"grayscale"},"#biomes":{"opacity":null,"filter":"url(#blur5)","mask":null},"#stateBorders":{"opacity":1,"stroke":"#56566d","stroke-width":1,"stroke-dasharray":2,"stroke-linecap":"butt","filter":null},"#provinceBorders":{"opacity":1,"stroke":"#56566d","stroke-width":0.4,"stroke-dasharray":1,"stroke-linecap":"butt","filter":null},"#cells":{"opacity":null,"stroke":"#808080","stroke-width":0.1,"filter":null,"mask":null},"#gridOverlay":{"opacity":0.8,"size":null,"type":null,"stroke":"#808080","stroke-width":0.5,"stroke-dasharray":null,"stroke-linecap":null,"transform":null,"filter":null,"mask":null},"#coordinates":{"opacity":1,"data-size":12,"font-size":12,"stroke":"#d4d4d4","stroke-width":1,"stroke-dasharray":5,"stroke-linecap":null,"filter":null,"mask":null},"#compass":{"opacity":0.8,"transform":null,"filter":null,"mask":"url(#water)","shape-rendering":"optimizespeed"},"#rose":{"transform":null},"#relig":{"opacity":0.7,"stroke":"#404040","stroke-width":0.7,"filter":null},"#cults":{"opacity":0.6,"stroke":"#777777","stroke-width":0.5,"stroke-dasharray":null,"stroke-linecap":null,"filter":null},"#landmass":{"opacity":1,"fill":"#000000","filter":null},"#markers":{"opacity":null,"rescale":1,"filter":"url(#dropShadow01)"},"#prec":{"opacity":null,"stroke":"#000000","stroke-width":0.1,"fill":"#003dff","filter":null},"#population":{"opacity":null,"stroke-width":1.6,"stroke-dasharray":null,"stroke-linecap":"butt","filter":null},"#rural":{"stroke":"#0000ff"},"#urban":{"stroke":"#ff0000"},"#freshwater":{"opacity":1,"fill":"#000000","stroke":"#515151","stroke-width":0,"filter":null},"#salt":{"opacity":1,"fill":"#000000","stroke":"#484848","stroke-width":0,"filter":null},"#sinkhole":{"opacity":1,"fill":"#000000","stroke":"#5f5f5f","stroke-width":0.5,"filter":null},"#frozen":{"opacity":1,"fill":"#000000","stroke":"#6f6f6f","stroke-width":0,"filter":null},"#lava":{"opacity":1,"fill":"#000000","stroke":"#5d5d5d","stroke-width":0,"filter":""},"#sea_island":{"opacity":1,"stroke":"#1f3846","stroke-width":0,"filter":"","auto-filter":0},"#lake_island":{"opacity":0,"stroke":"#7c8eaf","stroke-width":0,"filter":null},"#terrain":{"opacity":null,"filter":null,"mask":null},"#rivers":{"opacity":0.2,"filter":"url(#blur1)","fill":"#000000"},"#ruler":{"opacity":null,"filter":null},"#roads":{"opacity":0.9,"stroke":"#d06324","stroke-width":0.7,"stroke-dasharray":2,"stroke-linecap":"butt","filter":null,"mask":null},"#trails":{"opacity":0.9,"stroke":"#d06324","stroke-width":0.25,"stroke-dasharray":".8 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     localStorage.setItem("styleMonochrome", monochrome);
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diff --git a/modules/ui/tools.js b/modules/ui/tools.js
index de577b58..8b6234fa 100644
--- a/modules/ui/tools.js
+++ b/modules/ui/tools.js
@@ -22,12 +22,12 @@ toolsContent.addEventListener("click", function(event) {
 
   // Click to Regenerate buttons
   if (event.target.parentNode.id === "regenerateFeature") {
-    if (sessionStorage.getItem("regenerateFeatureDontAsk")) {processFeatureRegeneration(button); return;}
+    if (sessionStorage.getItem("regenerateFeatureDontAsk")) {processFeatureRegeneration(event, button); return;}
 
     alertMessage.innerHTML = `Regeneration will remove all the custom changes for the element.<br><br>Are you sure you want to proceed?`
     $("#alert").dialog({resizable: false, title: "Regenerate element",
       buttons: {
-        Proceed: function() {processFeatureRegeneration(button); $(this).dialog("close");},
+        Proceed: function() {processFeatureRegeneration(event, button); $(this).dialog("close");},
         Cancel: function() {$(this).dialog("close");}
       },
       open: function() {
@@ -51,7 +51,7 @@ toolsContent.addEventListener("click", function(event) {
   if (button === "addMarker") toggleAddMarker();
 });
 
-function processFeatureRegeneration(button) {
+function processFeatureRegeneration(event, button) {
   if (button === "regenerateStateLabels") {BurgsAndStates.drawStateLabels(); if (!layerIsOn("toggleLabels")) toggleLabels();} else 
   if (button === "regenerateReliefIcons") {ReliefIcons(); if (!layerIsOn("toggleRelief")) toggleRelief();} else 
   if (button === "regenerateRoutes") {Routes.regenerate(); if (!layerIsOn("toggleRoutes")) toggleRoutes();} else 
@@ -61,8 +61,8 @@ function processFeatureRegeneration(button) {
   if (button === "regenerateStates") regenerateStates(); else
   if (button === "regenerateProvinces") regenerateProvinces(); else
   if (button === "regenerateReligions") regenerateReligions(); else
-  if (button === "regenerateMarkers") regenerateMarkers(); else
-  if (button === "regenerateZones") regenerateZones();
+  if (button === "regenerateMarkers") regenerateMarkers(event); else
+  if (button === "regenerateZones") regenerateZones(event);
 }
 
 function regenerateRivers() {
@@ -230,19 +230,43 @@ function regenerateReligions() {
   if (!layerIsOn("toggleReligions")) toggleReligions(); else drawReligions();
 }
 
-function regenerateMarkers() {
-  // remove existing markers and assigned notes
+function regenerateMarkers(event) {
+  let number = gauss(1, .5, .3, 5, 2);
+
+  if (event.ctrlKey) {
+    const numberManual = prompt("Please provide markers number multiplier", 1);
+    if (numberManual === null || numberManual === "" || isNaN(+numberManual)) {
+      tip("The number provided is invalid, please try again and provide a valid number", false, "error", 4000);
+      return;
+    }
+
+    number = Math.min(+numberManual, 100);
+  }
+
+  // remove existing markers and assigned notes  
   markers.selectAll("use").each(function() {
     const index = notes.findIndex(n => n.id === this.id);
     if (index != -1) notes.splice(index, 1);
   }).remove();
 
-  addMarkers(gauss(1, .5, .3, 5, 2));
+  addMarkers(number);
 }
 
-function regenerateZones() {
+function regenerateZones(event) {
+  let number = gauss(1, .5, .6, 5, 2);
+
+  if (event.ctrlKey) {
+    const numberManual = prompt("Please provide zones number multiplier", 1);
+    if (numberManual === null || numberManual === "" || isNaN(+numberManual)) {
+      tip("The number provided is invalid, please try again and provide a valid number", false, "error", 4000);
+      return;
+    }
+
+    number = Math.min(+numberManual, 100);
+  }
+
   zones.selectAll("g").remove(); // remove existing zones
-  addZones(gauss(1, .5, .6, 5, 2));
+  addZones(number);
   if (document.getElementById("zonesEditorRefresh").offsetParent) zonesEditorRefresh.click();
 }