I realize that there is a web page that does address changing note heads. Unfortunately for some reason MuseScore is not allowing me to change that at all. The part that I am trying to change it for is for a drum set part. I am using the latest version (as of 3-20-19) of MuseScore, 3.05.
Additionally I would like to be able to change some of the note heads permanently. Specifically have "side stick" be called "cross stick" and change the note head with one that has circle around the notehead. Then I would have the "rim shot" with the cross note head.