The use case for this is: with some bills, a pdf is attached. Currently it is not possible to attach this to the payment transaction, only image files can be attached.
If the pdf is one page, I can convert it to JPEG and attach the result. This is somewhat inconvenient, but I can live with it.
If however the pdf is multi page, which occurs, I am at a loss.
Please consider making it possible to attach a pdf to a transaction and either present it natively in Manager, or launch a system pdf viewer with it.