docs/userguide: clarify proportional resizing with floating modifier (Thanks Donald)

diff --git a/docs/userguide b/docs/userguide
index 5b8c15442a30472cb609fae611a30b489793a93d..901e0f5aa53fd55cdb4d1d5af132c24de4acdef1 100644 (file)
--- a/docs/userguide
+++ b/docs/userguide
@@ -357,7 +357,8 @@ it to the position you want.
 
 When holding the floating modifier, you can resize a floating window by
 pressing the right mouse button on it and moving around while holding it. If
-you hold the shift button as well, the resize will be proportional.
+you hold the shift button as well, the resize will be proportional (the aspect
+ratio will be preserved).
 
 *Syntax*:
 --------------------------------