Changing Measure Numbers
I read the instructions:
MuseScore automatically numbers the first measure of each System (except for the first system, actually except for a measure with the number 1), but more numbering options are possible. From the main menu, choose Style → General..., in the left pane, choose the "Header, Footer, Numbers" tab. At the bottom of the right pane is the "Measure Numbers" ("Bar Numbers") section.
Mark the checkbox next to the "Measure Numbers" ("Bar Numbers") to turn on automatic measure numbers.
Mark "Show first" if you want the first measure numbered.
BUT - The box "Show First" gets whited out if you uncheck "Measure Numbers"
I want to re-assign the first partial measure as measure 1.
Thanks for any suggestions. (Musescore 2.0.3)