Is there some trick to allow me to crop a screen shot in Apple's Preview.app to 4:3 or 16:9 dimensions?

I did notice holding down shift causes a 1:1 rectangular selection, but I need other common ratios.

I am willing to accept a solution from other lightweight tools.

  • What software are you talking about? – Bob Sep 15 '17 at 7:56
  • Image cropping software? – hendry Sep 15 '17 at 9:06
  • Did you answer my question or do you ask me another question? – Bob Sep 15 '17 at 9:45

I do not use the Photos app for much, but I use it for this. I import the photo I want to crop. Click on the edit tool in the upper right and in the lower right you'll see "Aspect" with various options. You can crop to any of the desired ratios or customize a ratio. Once cropping is complete, I export the photo and delete it from Photos.

E.g., this makes it easy to crop a 4:3 digital photo to 16:9 for use as desktop.

  • Would appear I can't import PNGs to the Photos.App – hendry Sep 17 '17 at 1:37
  • Convert the PNG to JPEG. Open up the screen shot in Preview, hold down option key while selecting File menu, Save As... JPEG. – UncaMikey Sep 17 '17 at 13:28

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