General text field

How do you create a “general” text field? That is, text that might contain general instructions/comments not attached to a specific bar or note.

Or create a text frame in Engrave Mode (more info here).

Or use a Marker (but if the tempo or music change, the Marker will stay pinned to its current time-stamp by default).

Thanks! But I think the idea of inserting a text frame in Engrave mode is more useful (easier) for this purpose.