PDF basic FEEDBACK
When you use Song data and PDF document area, compared to TEXT editor it needs help.
Firstly it has no undo/redo but has a cancle which actually gets rid of your pdfs so if you use the pecil and make a mistake which is very common you expect an undo not a completely get rid of the pdf, if you then hit save by mistake you have just cleared your song, off you go to the begining of loading another pdf, now that points out another thing you cant easily load another pdf from this area which does not make it efficient you have to go to song and use the plus process, this is wasting time specially when you did not mean to get rid of the file in the first place.
So why would you go here? If you wanted to hand write over the PDF and thats it no other use,
Att least a LOAD new pdf in this area would give it two reasons to go there.And perhaps an editor with undo and if possible the ability to use the keyboard to insert typed text over the pdf, otherwise there is really no point to go there unless you need to quick scribble on page.
UPDATE! just noticed the CLEAR issue is only on ipad pro , and is working as expected on iphone11 max
Two suggestions,
1
why not stick to undo as in text editor to maintain consistancy, one way or the other but the same in all.
2
Song detail
Song information
PDF document heading is not consistant with Edit Text
Why not call it Edit PDF, specially when thats all you can do with it there anyway.
Quick suggestion, perhaps a slide to left gives you two options DELETE and LOAD
i would also give this load capability next to SAVE in the in the actual pdf editor, to give the user very fast work flow choices since there is not much more the user can do there but scribble.
MORE FINDING
i just realized the CLEAR on ipad with single page pdf works as expected, the file i was testing on had 3 pages, and when i hit CLEAR after scribbling all 3 pages went blank, so this issue might be related to multi page pdfs only. I have not tested it yet by creating another multi page pdf loading it then editing it then hitting clear, i will try this soon but perhaps keep this in mind when trying to recreate this issue.
Example
After hitting CLEAR