Guitarists and bassists can add tab that only they see — and it transposes with the song.
Add tab to a song that's just for you. Nobody else on the team sees it, and it isn't part of the shared chart.
When a leader puts the song in a service in a different key, your tab moves with it — the frets shift by the same amount as the chords, so it still lines up. It shows under the chart on your stage view and yours alone.