Fix keystone effect in Photos on Mac 2023?

For looking up at a building, in Edit Mode choose Crop, then Vertical, like here:

In the screenshot, I've set it to compensate for looking up at Big Ben, but you can turn the slider the other way when looking down on something when you want it to look like you're not. Of course, the building won't be the only thing distorted, we must use caution.

You can also use the Horizontal slider for looking at buildings along the street, for instance.

Ihor280 wrote: Now just need to figure out how to restore color in faded photos.

To get a range of suggestions, you really should start a fresh question. But I'll make suggestions, anyway.

First thing to try is with "White Balance." If there are people, you can set it to "Skin Tone" and click the eye dropper on someone's face or hand. Depending on shadow, you may get different effects clicking in different places, but you may find one spot that works really well. Or not.

If that doesn't work, the next thing to try is "White Balance" set to "Neutral Gray." You try clicking the dropper on places that shouldn't have color-- best if between white and black. Again, you'll get different effects clicking in different places, but you may find a Goldilocks spotl. Or not.

When you get close, try Selective Color, use the dropper to choose the color you think is too strong, and adjust saturation and luminance.

Often you can get pretty close-- but some pictures just have all the red (or something) sucked out of them, and there's nothing you can do to restore it.

Good luck