Adapt note range to tuning

As you know, baroque guitars have mostly a reentrant tuning. Eg, the second one (French baroque tuning, Robert de Visée and others) on the image below. But it's not a low D (ie a D2, fourth ledger line under the staff) , like we are accustomed in the case of contemporary classical or acoustic guitars.

As you know too, there is no single strings, but double strings which are call, courses. That means the total of strings is 11.
The fourth course (and fifth course, and sometimes, third course) are tuned, depending the country/composers, with the same pitch, or doubled with an octave.
There is no way in the program to distinguish on the same string/TAB line two differents pitches (eg a D4 and D3)
So, you have to do a choice, either D4 or D3
The simplest is to use the tuning of an actual guitar, ie E4/B3/G3/D3/A2 (and by removing the 6th string, E2 but not really necessary, since this string was added from the classical/romantic area, and so, unuseful for the baroque repertoire. Except if you do some arrangements for classical guitar)

For 6 string guitar with 'dropped D' tuning (see attachment)...
Right click on an empty spot on the staff, then change the pitch range to D2 in Staff Properties.

See:
https://musescore.org/en/handbook/staff-properties

OR...

To disable out-of-range coloration of notes: From the menu, select Edit→Preferences... (Mac: MuseScore→Preferences...), click on the "Note Input" tab, and uncheck "Color notes outside of usable pitch range."
See:
https://musescore.org/en/handbook/note-input#coloring-of-notes-out-of-r…

Regards.