Is there a program that allows me to dim the screen to only one program on my computer?

eg. If I am presenting something (not in full screen ;), dim the rest of the screen except for the selected window (in other words, 'spotlight' into the selected window)

I would like:

  • it to be free
  • do the above
  • run on Windows 7 64 bit

2 Answers 2


CinemaDrape and Screenmask can be used to focus only on a particular area on a screen.

  • Please add details on the programs, for future users. I ended up using CinemaDrape Jul 30, 2014 at 17:57

LeDimmer is an app that lets you dim the area surrounding the active window on you screen.


  • Very light weight ( 80 KB )

  • Use very little RAM ( 732 KB )

  • Instantly dims the surrounding environment when open

  • Runs in the background and hides in system try

  • It will automatically brighten and dim windows as the active window

  • It works alongside F.lux

  • It is portable and hence can be run from a USB drive also.

  • Custom dark image can also be set for the background.

All the settings need to be applied through command line only. The default settings will meet the requirement for most users.

C:\LeDimmer\LeDimmer.exe -alpha N(1-250) changes background dimness value. 250 makes background completely black.

C:\LeDimmer\LeDimmer.exe -image imagename.bmp can be used to set custom background image. Only .bmp images can be used

  • 1
    The question isn't about dimming the whole screen, just the area outside the active window.
    – DaveP
    Jul 25, 2014 at 8:26
  • No, I want to dim the rest of the screen, and focus on a part of it (like a spotlight)! Jul 25, 2014 at 10:04
  • @ṧнʊß I have updated my answer.Please have a look. Jul 25, 2014 at 14:24

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service and acknowledge that you have read and understand our privacy policy and code of conduct.

Not the answer you're looking for? Browse other questions tagged or ask your own question.