Some years ago I read tip to stop Help popping up on top of the open document. (At the time I found it annoying as you couldn't actually see the document.)

I would like to reverse this, but cannot remember how I did it, or even find the original hint.

1 Answer 1


In Terminal, simply paste the following and hit return:

defaults write com.apple.helpviewer DevMode -bool true

The changes should take effect immediately, though you will need to close any Help windows that are currently open.

To undo it, run the same command but with false:

defaults write com.apple.helpviewer DevMode -bool false

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