I am having a problem saving a PDF poster I've made on Photoshop. When I try to run it through a screen reader, it reads out every letter individually "l i k e t h i s ."I have tried playing with settings but can't find anything that seems to affect it. I also have InDesign and illustrator, but am not as skilled with them.

I'd appreciate any help, or any advice of where else to ask? Adobe didn't work, I think something to do with my uni account, but anyway thanks in advance!!