Editing in New Chart
I created a New score for "drumset" that is filled with rests. I tried to edit the first bar with the input toggle and selecting s quarter note. I click in the bar, but the chart does replace the rest. I played with this for 15 minutes and was unable to affect any change. What am I doing wrong. Please advise.
A drumset uses two voices, voice 1 (Blue) and voice 2 (Green). Voice 1 notes (cymbals, snares, and most others played with hands) have upward stems; voice 2 notes (mostly footwork) have downward stems. I'm assuming you entered a note with a downward stem, like a "B" for the bass drum. If you enter an "A" for the snare, you should see a note with an upward stem replacing part of the initial rest.
For a drumset, I recommend always using the "N" shortcut to enter input mode. You should see a table of the available "sounds" in the drumset. In that table, the blue notes are voice 1 notes and the green notes are voice 2 notes. A single click will give you the sound; a double click will add a note. The shift key works as with other note input.
You can also use to go from voice 1 to voice 2 and to go from voice 2 to voice 1.
How about attaching whatever you have, in your current work-in-progress score?