Hi Kenneth! @k3t6
I have a Mac, running macOS 10.12.6 Sierra. I’m not sure how to resize something in iCloud, but I suspect it’s somewhat similar to doing it if the photo is on “the ground” on your hard drive :). In Preview,
I resize my photos in Preview, but I believe you can also do this in Photos. In Finder (on your desktop or in a folder somewhere), open your image by double clicking. Preview is the default program that should open it. Then click File –> Duplicate to save a new image so you don’t write over your full size image. Then click Tools –> Adjust Size… . There will be a little window that opens with a few options for resize. I use the custom size, and then resize my image to something like 2400 by 1600 pixels and 72 pixels/inch for lenspiration, and I leave the “Scale Proportionately” and “Resample Image” boxes checked. Click “OK” and then save your image!
Click File–>Export–>Export 1 Photo… .
Then Set your file type (JPEG is best for lenspiration), leave image quality on High, Color Profile on sRGB, then size to “custom.” Max: Dimension: 2400 (I’ve done 1500 before; your won’t have to worry as much about image theft that way, but it’s not as sharp). Click “Export” and then you have your image, resized and ready for Lenspiration