CAN'T FIND COMBINE. CAN'T FIND HOW TO SIZE BEFOREHAND. NOT USER FRIENDLY

Hey @keith_9245, welcome to our Adobe Express community! 

Thanks for posting here!

Can you please tell us how you want to combine these pages? After combining the files in the project, what type of export are you expecting? 

If you're trying to export these pages in a single PDF, that is possible with the download option in the top right corner. You can either select all or the required pages and select Download > All Pages/selected pages > File format (PDF) > click Download.

Could you let us know if this is what you're referring to?

Hope this helps!

Best,

Amitej