Hi all! The post itself had a lot of information crammed in, and I’ve found some solutions, but I wanted to compile them here so anyone who has the same problem later can find the solution quickly.
NOTE: I have a decent amount of experience with Illustrator and Photoshop, and limited experience with InDesign and Adobe Express.
Adobe Express Beta (InDesign) doesn’t preserve transparency when editing
It does, under the right conditions. It will save your file as the original file type. So:
> Editing a .PNG > Saves as a .PNG > Preserves transparency
> Editing a .JPG > Saves as a .JPG > Does not preserve transparency
As far as I can tell, it doesn’t let you change this while saving.
Solution: I’ll just be using Photoshop for now. It’s not worth changing all my images to .PNG ahead of time when it would take the same amount of time/effort to just use Photoshop, just for it to be lower quality, haha.
Photoshop (InDesign) unavailable (greyed out)
I needed to send in a working version earlier in the day and embedded all my images (I worked in production art for a few years [Illustrator for apparel though, not InDesign], so it’s just force of habit to make sure I dot my i’s and cross my t’s, even if it’s not necessary). I realized later that InDesign’s ‘Edit With’ feature doesn’t work with embedded images.
Solution: I just relinked all my image files and used Photoshop in the end
.PNG vs .TIFF/.PSD
.TIFF or .PSD are both higher quality files, and would definitely be preferred. In this specific case I was working on smaller images, so .PNG wouldn’t have hurt much; I also assumed Adobe Express Beta wouldn’t have the ability yet to save files as .TIFF/.PSD, since it’s just meant to be a ‘quick edit’ type of tool-- and I thought that the ability to save as .PNG or .JPG would be a lot more likely.
Solution: Since I ended up using Photoshop, I did just save all the edits I made as .TIFF
FINAL CONCLUSION: If somewhere down the road Adobe Express Beta becomes a little more customizable, it will probably be a useful tool within InDesign for quick, simple edits. It’s a little too new right now, so it’s features are limited. Might work in some circumstances still, but in this case it was easier to use Photoshop.
Thank you everyone for your help!