upd

bin/snapwin

@@ -1,8 +1,8 @@
 #!/bin/bash
-###  snapwin - click on the appropriate area of the window to snap it in a given direction. 
-#    Works with active and inactive windows.
-#    Same actions are available for kebindings: topleft, top, topright, left, center, right,
-#    bottomleft, bottom and bottomright.
+#:  snapwin - click on the appropriate area of the window to snap it in a given direction. 
+#:   Works with active and inactive windows.
+#:   Same actions are available for kebindings: topleft, top, topright, left, center, right,
+#:   bottomleft, bottom and bottomright.
 #    Copyright (C) Daniel Napora <napcok@gmail.com> 2021
 #    https://maboxlinux.org
 # 
@@ -136,10 +136,13 @@ moveto() {
     POS_CODE="$1"
     _movewin
 }
-
+usage() {
+    grep "^#:" $0 | while read DOC; do printf '%s\n' "${DOC###:}"; done
+    exit
+}
 
 case "$1" in
     "")       clicksnap ;;
     topleft|top|topright|left|center|right|bottomleft|bottom|bottomright) moveto "$1" ;;
-    *)        usage ;;
+    -h|--help)        usage ;;
 esac