delta xy is a FREE mouse coordinate measurement program. It allows you to make precise measurements of just about anything on your computer's monitor. It can also show you the ASCII character and key codes for most of the keys on your keyboard, and the RGB values of any pixel on your monitor.
Click on the padlock icon in the upper-right corner of delta xy's window to toggle it open or closed. When it's open, you can switch to other applications. When it's closed, delta xy is “locked” in the foreground. This means you can click anywhere on your screen, to take the necessary measurements, and you'll never switch to another application. You can also toggle the locked/unlocked mode with the Lock command in the File menu or by pressing command-space.
The top row of numbers (labeled “xy”) indicates the absolute mouse coordinates; where 0,0 is the top-left corner of your monitor. The second row of numbers (labeled “Δxy”) indicates the mouse coordinates relative to the last place you clicked the mouse.
When delta xy is locked in the foreground, clicking the mouse anywhere on you screen resets the Δxy value to 1,1. You can also reset the Δxy value to 1,1 at any time by simultaneously pressing the option and command keys; this works whether delta xy is in the foreground or background, locked or unlocked.
NOTE: When delta xy is in locked mode, no background applications get any time to run. To safeguard against leaving delta xy locked indefinitely, it automatically unlocks itself after 30 seconds of inactivity (i.e. no mouse movement, mouse clicks, or key presses have occurred.) You can override the auto-unlock feature by holding down the option key while you click the padlock closed.
The “char”, “code”, and “key” items in delta xy's window show you the corresponding character, character code, and key code for most key combinations you can type on your keyboard. This feature works whether delta xy is in locked or unlocked mode. You can also paste any character from the clipboard to see the character and character code for that character.
The “rgb” item shows you the red, green, and blue components of any pixel on your monitor. Simply position the cursor directly over the pixel of interest. This feature works whether delta xy is in the foreground or background, locked or unlocked.
Finally, you can copy the xy, Δxy, char, and rgb values to the clipboard by using the corresponding Copy commands in the Edit menu. Values can be viewed in either decimal or hexadecimal, and delta xy now remembers and restores it's last window position each time you run it.
