How do you change from bass clef to treble clef in Musescore?
Add/change clef at the beginning of a measure
Drag a clef from the palette onto a measure. Select an existing clef and click a clef in the palette (double-click in versions prior to 3.4). Drag a new clef from the palette onto an existing clef.
How far is bass clef from treble?
The bass clef has the F-below-middle-C close to the middle, the treble clef has the G-above-middle-C close to the middle. You're right, middle C is missing and is the ledger line above the left hand, below the right hand. But 11 lines would be unreadable.