diff --git a/Resources:-spread-functions.md b/Resources:-spread-functions.md
index 5f330e7..194421f 100644
--- a/Resources:-spread-functions.md
+++ b/Resources:-spread-functions.md
@@ -13,7 +13,7 @@ Build-in functions make models syntax easier to read:
 * `maxHeight(number)`: true if cell height <= number
 * `minTemp(number)`: true if cell temperature (in Celsius) >= number
 * `maxTemp(number)`: true if cell temperature <= number
-* `shore(number)`: check against cell distance to shore, where `1` is land next to water (coastline cells), `2` - next land ring, `-1` - water cells next to land (shallow water), `-2, -3, ...` - next water rings, `0` - value not assigned, usually values are assigned only for first 2 land rings, so other land cells have zero value
+* `shore(ringId, ringId, ...)`: check against cell distance to shore, where `1` is land next to water (coastline cells), `2` - next land ring, `-1` - water cells next to land (shallow water), `-2, -3, ...` - next water rings, `0` - value not assigned, usually values are assigned only for first 2 land rings, so other land cells have zero value
 * `type(string)`: check against cell type. Types of all water cells connected to map border is `ocean`, lake types are `freshwater`, `salt`, `sinkhole`, `frozen`, `lava` and `dry`. Land types are defined not so clear, so I don't recommend to use them. In any case land types are `continent`, `island`, `isle` and `lake_island`
 * `nth(number)`: true for each nth cell only, e.g. `nth(2)` skips 50% of cells, `nth(5)` skips 80% of cells
 * `random(number)`: percentage of true, e.g. `50` will return true in 50% of cases