diff --git a/windowmanagement.sh b/windowmanagement.sh
index 3726514..402e06b 100755
--- a/windowmanagement.sh
+++ b/windowmanagement.sh
@@ -2,68 +2,106 @@
 
 # 2022 R. Branten
 # ----
-# position windows
+# This script manages window positioning and sizing on X11 systems
+# It allows positioning windows in different preset layouts using xdotool and wmctrl
+# Requires xdpyinfo, xdotool and wmctrl to be installed
 # ----
-# get witdh of screen, not needed as percentages work just fine
+
+# check if xdpyinfo is installed
+if ! command -v xdpyinfo &> /dev/null
+then
+    notify-send WindowManagement: "xdpyinfo not installed"
+    exit 1
+fi
 
 # check if xdotool is installed
 if ! command -v xdotool &> /dev/null
 then
     notify-send WindowManagement: "xdotool not installed"
-    exit
+    exit 1
 fi
 
-SCREENWIDTH=$(xdpyinfo | awk '/dimensions/{print $2}' | grep -oE ^[[:digit:]]\+)
-SCREENHEIGHT=$(xdpyinfo | awk '/dimensions/{print $2}' | grep -oE [[:digit:]]\+$)
-PANELHEIGHT=$(xdotool getwindowgeometry  $(xdotool search --onlyvisible --class 'panel') | awk '/Geometry/{print $2}' | grep -oE [[:digit:]]\+$)
-HEIGHT=$SCREENHEIGHT-$PANELHEIGHT
+# check if wmctrl is installed
+if ! command -v wmctrl &> /dev/null
+then
+    notify-send WindowManagement: "wmctrl not installed"
+    exit 1
+fi
+
+# Function to get usable screen height (screen height minus panel height)
+get_usable_height() {
+    local screen_height=$(xdpyinfo | awk '/dimensions/{print $2}' | grep -oE [[:digit:]]\+$)
+    local panel_height=$(xdotool getwindowgeometry  $(xdotool search --onlyvisible --class 'panel') | awk '/Geometry/{print $2}' | grep -oE [[:digit:]]\+$)
+    echo $((screen_height - panel_height))
+}
 
 # extract and set argument
 case $1 in
-    center)                                                                     # 100% window size centered
+    center)
+        # center window, unused as native window size is used
         WIDTH=100%
-        HEIGHT=100%
-        XPOS=0%
+        XPOS=50%
+        MESSAGE="center"
         ;;
-    center50)                                                                   # 50% window size smack in the middle
+    center50)
+        # set window to 50% of screen and place in center of screen
         WIDTH=50%
         XPOS=25%
+        MESSAGE="50% center"
         ;;
-    left25)                                                                     # 25% window size left side of screen
+    left25)
+        # put a window to 25% of screen and place in left side of screen
         WIDTH=25%
         XPOS=0%
+        MESSAGE="25% left"
         ;;
-    right25)                                                                    # 25% window size right side of screen
+    right25)
+        # put a window to 25% of screen and place in right side of screen
         WIDTH=25%
         XPOS=75%
+        MESSAGE="25% right"
         ;;
-    left50)                                                                     # 25% window size left side of screen
+    left50)
+        # put a window to 50% of screen and place in left side of screen
         WIDTH=50%
         XPOS=0%
+        MESSAGE="50% left"
         ;;
-    right50)                                                                    # 25% window size right side of screen
+    right50)
+        # put a window to 50% of screen and place in right side of screen
         WIDTH=50%
         XPOS=50%
+        MESSAGE="50% right"
         ;;
-    centerleft25)                                                               # 25% window size left side of center screen
+    centerleft25)
+        # 25% window size left side of center screen
         WIDTH=25%
         XPOS=25%
+        MESSAGE="25% left from center"
         ;;
-    centerright25)                                                              # 25% window size right side of center screen
+    centerright25)
+        # 25% window size right side of center screen
         WIDTH=25%
         XPOS=50%
+        MESSAGE="25% right from center"
         ;;
     *)
+        echo "usage: $0 [center|center50|left25|right25|left50|right50|centerleft25|centerright25]"
         exit
         ;;
 esac
 
-# resize window
-#xdotool getactivewindow windowsize $WIDTH $HEIGHT
-xdotool getactivewindow windowsize $WIDTH 95%
+# get current window
+currentWindow=$(xdotool getactivewindow)
 
-# move window to location
+# undo maximized
+wmctrl -ir $currentWindow -b remove,maximized_vert,maximized_horz
+
+# resize window use 95% of height
+xdotool getactivewindow windowsize $WIDTH $(get_usable_height)
+
+# move window to location steer clear of top
 xdotool getactivewindow windowmove $XPOS 0.1
 
 # display alert window
-notify-send WindowManagement: "${1}"
+notify-send WindowManagement: "${MESSAGE}"