Hard to right-click single-line staff
GIT commit: 44debd7/ Windows 10
1) New score for concert snare drum (Percussion - Unpitched), or woodblock, so, percussion 1 line.
2) Try to select the first or another measure
Result: you cannot. Ditto for context menu (right-click -> staff properties etc.)
The only way is to select the rest.
3) Press "N" and enter a few notes
Result: the input is messed (notes centering, stems, clef)
Same result when reducing (in staff properties) the number of lines to 1 for a standard staff