Adding ALT text to an image

[Petran]

So...I must be missing something!
I'm on a Mac and trying to add alt text to my images for my Amazon seller account (I don't see an option to add them in the amazon seller central)
However I can't work out how to do it? There's no option on my Mac to do this, and no mention of alt text anywhere - the nearest suggestion I've tried online is to drop the image into a word doc - which works, but then the image is the wrong size to re-upload to my seller account, and I can't resize it in a word doc.
Any tech genius's available at this time on a Friday night??

[Petran]

Appreciate it’s dull 🤓