Pressing space on a selected file in Finder evokes a preview window. Can I enlarge the size of this window by default to get a larger preview e.g. of images?

2 Answers 2


This is answered over here, but basically you'll need to edit the "QLPreviewHeight" and "QLPreviewWidth" values in the Info.plist file inside the QuickLook plugin that handles images (you'll need select the plugin and choose "Show Package Contents" to get at the plist).

You can see your list of plugins with the command: qlmanage -m plugins

If qlmanage shows that "public.images" are handled by the built-in plugin (/System/Library/QuickLook/Image.qlgenerator), you shouldn't need to adjust dimensions since the window opens to the image's size by default. However if you do need to make changes, just copy the plugin into your directory (~/Library/QuickLook) and then edit it with Apple's XCode (downloadable from the App Store).


You should be able to click/drag the corners of the Quick Look window. I at least know you can in OS X El Capitan.

  • 1
    This works once but the question is about setting a default.
    – grg
    Mar 5, 2016 at 23:35

You must log in to answer this question.

Not the answer you're looking for? Browse other questions tagged .