Hi Gareth,
let me first thank you for this tremendously useful app!
I like to keep a backup of all songs in a set as pdf files on my google drive, just to be safe in case of a tablet failure.
On the Export (Set) page, I select the option 'Include songs identified in the set' and in the section 'OpenSong formatted songs can also be converted to the following formats', I want to check PDF only. It seems to me that the checkboxes for the different export formats seem to work, as tapping on their location seems to switch on or off the export of that format. However, I can not see the checkboxes, neither when they are on or off. Maybe this is due to the dark color-scheme that I use.
Another (minor) problem with the file export: using screenshot does not produce an exact lookalike of what I see on the screen. Songs that appear in multiple columns on the screen are slightly distorted, with the right column partially overlapping the left column. Therefore I currently use pdf, although I would prefer screenshot.
Best regards,
Thommi