diff --git a/pixler.bas b/pixler.bas
index 7c6b641..68a4c72 100644
--- a/pixler.bas
+++ b/pixler.bas
@@ -86,7 +86,7 @@ do
         oldheight=_height
     end if
 
-    cls ,backgroundcolor1
+    cls,backgroundcolor1
 
     ' Process all inputs and update offsets
     while _mouseinput:mw=mw+_mousewheel:wend
@@ -125,7 +125,7 @@ do
             state.brushsize=state.brushsize+1
             addcommand"brushsize ("+tst(state.brushsize)+")"
         case "-"
-            if state.brushsize>1 then 
+            if state.brushsize>1 then
                 state.brushsize=state.brushsize-1
                 addcommand"brushsize ("+tst(state.brushsize)+")"
             end if
@@ -133,6 +133,23 @@ do
             state.zoom=1
             state.offsetx=(_width/2)-(_width(layers(0).ihandle)/2)
             state.offsety=(_height/2)-(_height(layers(0).ihandle)/2)
+
+        case "f","F"
+            ' --- ZOOM TO FIT ("f") OR OVERFLOW SHORTEST SIDE ("F") ---
+            ' 1. Calculate and choose the fitting ratio based on the lowercase/uppercase state
+            if (((_width-(showtoolbox and 70)-(showcommands and 250)) \ _width(layers(0).ihandle))<((_height-(showcolorpicker and 20)) \ _height(layers(0).ihandle)) xor (keyin="F")) then
+                state.zoom=((_width-(showtoolbox and 70)-(showcommands and 250)) \ _width(layers(0).ihandle))
+            else
+                state.zoom=((_height-(showcolorpicker and 20)) \ _height(layers(0).ihandle))
+            end if
+
+            ' 2. Clamp the zoom factor within safe limits (1 to 20)
+            if state.zoom<1 then state.zoom=1 else if state.zoom>20 then state.zoom=20
+
+            ' 3. Center the canvas inside the viewport (overflowing sides will center-clip perfectly)
+            state.offsetx=(showtoolbox and 70)+(((_width-(showtoolbox and 70)-(showcommands and 250)) \ 2)-((_width(layers(0).ihandle)*state.zoom) \ 2))
+            state.offsety=(((_height-(showcolorpicker and 20)) \ 2)-((_height(layers(0).ihandle)*state.zoom) \ 2))
+
         case "t"
             showtoolbox=not showtoolbox
         case "c"
@@ -140,12 +157,12 @@ do
         case "l"
             showcommands=not showcommands
         case chr$(26) ' Ctrl+Z
-            if ubound(commands) > 3 then
+            if ubound(commands)>3 then
                 ' Drop the trailing empty slot and the last valid command
-                redim _preserve commands(ubound(commands) - 2) as string
+                redim _preserve commands(ubound(commands)-2) as string
                 ' Re-create the empty trailing slot required by addcommand
-                redim _preserve commands(ubound(commands) + 1) as string
-                redraw             
+                redim _preserve commands(ubound(commands)+1) as string
+                redraw
             end if
     end select