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A simple toolkit for UI designers & programmers.  

System Requirements Download

Windows XP/2k3/Vista/2k8/7/8.x/10

3 mb disk space
256 mb memory


MezerTools (v2.3.3; ~933kb)


Screen Measurement

Measure screen elements in pixels.  By default, the hotkey is Win+C (on Win8+, use Win+Shift+C)




Keyboard Shortcuts

  • Hit TAB to rotate the calipers
  • Hit CTRL+C to copy the size value to the clipboard
  • Hit SPACEBAR to change the right-caliper color
  • Hit SHIFT+SPACEBAR to change the left-caliper color
  • Hit + (plus key) to grow the width by 1 pixel
  • Hit - (minus key) to shrink the width by 1 pixel
  • Hit ENTER or F2 to set the size to a specified value
  • Use arrow keys to move the calipers without changing their size
  • Hit ESC to close the calipers

Measuring from the "right" or "top"

  • If you want to resize the calipers by dragging the "fixed" portion, simply hold CTRL or SHIFT while dragging the mouse.

Want more power?  Try the excellent Calipers from Iconico. They're shareware with an unlimited free trial. (Poke around-- there's some other good stuff there too!)

Screen Capture

By hitting Windows+S, you can capture an arbitrary screen rectangle.

When selecting a rectangle, you can use the mouse, or use arrow keys and +/- keys for single-pixel tweaking..

Using the right-mouse button (or holding down CTRL) to end the snapshot allows you to add stamps (left button) or highlight (middle button or CTRL+LeftButton) to the shot. You can then right-click to Save to ClipBoard, save to My Pictures, etc.

NEW: You can change the "red arrow" stamp to one of your own choosing. Save a PNG named MEZER_STAMP.PNG or a bitmap named MEZER_STAMP.BMP to your My Pictures folder. The color white will be transparent, and the exact center of the stamp will be placed at the mouse cursor (so use whitespace wisely).

You can also change the highlight color by editing the DrawColor registry key. To change from the default (red) to pink, for example, import the following registry entry: I Like Pink.

Alternatively, you can capture a windowed control's canvas.  To use the window capture feature, use Win+Alt+P to bring up the MezerTools window, and drag and drop the blue arrow to the window to copy.


Random Other features

  1. Hit Win+Alt+P to bring up the Mezer Dialog.
  2. Use the Hexer Tool to convert to/from Hexadecimal numbers
  3. Use the Color Dropper Tool to grab color codes from the screen
  4. Double-click any application's window border to grow that window to the edge of the monitor.


If you find there are hotkey overlaps with other programs on your system (especially on Windows 8 or 8.1), use the Registry Editor to edit the entries under HKCU\Software\Bayden Systems\Mezer.  Restart MezerTools to pick up the new hotkeys.

Simple command lines to change the Win+* value to other letters include:

Use "B"

REG ADD "HKCU\Software\
Bayden Systems\Mezer" /v "ScreenCapKey" /t REG_DWORD /d 66

Use "K"
REG ADD "HKCU\Software\Bayden Systems\Mezer" /v "ScreenCapKey" /t REG_DWORD /d 75

Use "A"

REG ADD "HKCU\Software\
Bayden Systems\Mezer" /v "ScreenCapKey" /t REG_DWORD /d 65

Use CTRL+ALT instead of the Windows key.

REG ADD "HKCU\Software\Bayden Systems\Mezer" /v "HotkeysModifier" /t REG_DWORD /d 3

Alternatively, you can free up Windows+S using a registry script or
REG ADD "HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\Advanced" /v "DisabledHotkeys" /t REG_SZ /d "S"


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