Keeping all images the same size in an iMac slideshow
How do,I keep all the images the same size in a slideshow on iMac ? 2020 iMac running Sequoia 15.7.2 (24G325)
iMac (2017 – 2020)
Well, first you tell us what app you're using for your slideshow. There are a gazillion apps out there that could conceivably do this.
If you're using Photos to display pictures from your Library, then you're kind of out of luck, since Photos will scale each photo to fill the screen - the only counter to this is editing each picture to make make sure that all photos have the same dimensions.)
Alternatively, you could use something like Keynote to create a slideshow, where you have more creative control over image size and placement (as well as motion/animation, transitions, etc.).
Other apps may have other (or more, or fewer) options. for example, if you're using the built-in screensaver to show a series of pictures, they may show scaled to full screen (like Photos.app), or they might be oversized to float around the screen, etc.
So, without knowing which app you're using, it's kind of hard to be more precise.