diff --git a/River-Editor.asciidoc b/River-Editor.asciidoc
index 402071c..1d6d457 100644
--- a/River-Editor.asciidoc
+++ b/River-Editor.asciidoc
@@ -1,5 +1,7 @@
 *River Editor* is aimed to individually edit existing river or create a new river. To open the Editor click on any river.
 
+Now you may drag the river. To change a river course drag red points (river key points). Close the Editor when customization is done.
+
 Buttons:
 
 * Resize - ability to rotate and re-scale the river, it may be a bit buggy, please use wisely