[e.k.]

Thanks for the fast answers,

merging files to a song I goto "rearrange pages", tap the 3 dots right/below the desired single page and can choose:

- insert file
           - local file
           - google drive
           - system file browser

- insert blank page or template
           - .........

- insert file from library (*)
           - select file (filter: collection, source, key; search:....; expand all, collapse all)
          
- view page
           - ............


(*)  One would expect here a possibility to select a song from the "usual library screen" (as shown if I open MS with all the songs, tabs, filters,....).
Here appears only a very reduced possibility to access files. CSV-generated files are shown (-> expand all), but are not selectable, just the whole pdf
(from which the csv-file is generated) is selectable.

Maybe a suggestion for future?
open song/files/rearrange page/3dots/insert file from library ---> open "usual library screen"
So, merge of songs are independent of their origin (pdf, csv,....). 

Summarized:
I assume the information of a csv-generated song is available, otherwise it couldn´t be shown in the song list.....
I can select a csv-generated song in the usual library screen, but why is no additional (*) "insert file/song from library"

......no idea, what this means for efforts/code....or, where I´m wrong.........just a user.....




thx, e.k.