[itsme]

Transposing works differently when it is applied on a displayed song and within the text editor: 
transposing a displayed song transposes the displayed song, saves the transpose in the database and leaves the songfile source unchanged.
transposing within the text editor changes the source file as specified
This is the intended behaviour.

But: wheras transposing a displayed song works fine for lyrics & chords, ABC sections and ChordGrids, transposing in the text editor transposes lyrics & chords and ABC sections, ChordGrids remain unchanged.

[itsme]

Here's an improved testfile and the according screenshots (MobileSheets 3.9.17, Win10), same behaviour on Android
       

I have to correct me: both ABC section AND chord grid are not transposed in the editor window

[itsme]

I noticed a second issue here: when transposing within the text editor the "Default display localization" shall be ignored. As the name says it's only relevant for the display.
In my case "Default source localization" is "Default", "Default display localization" is "Scandinavian". MobileSheets transposes Bb to H, correct would be transposing to B.
   

When trying to transpose this file again MobileSheets would fail as "Default source localization" is still "Default" so H is not a valid chord.

[Zubersoft]

I'll look into all of this.

Thanks,
Mike