about the measures | MuseScore

1) First, this sub-forum (Made with MuseScore sub-forum, musescore.org/en/forum/159) is intended to be used to show off what you’ve scored with MuseScore. You would probably be better off posting this elsewhere. In this case, likely the Support and bug reports sub-forum (musescore.org/en/forum/6), intended for problems and how-tos, would be the best choice.

2) That said, there are at least two ways to delete measures. a) Select one or more measures and press Ctrl+Delete. b) If the measures are all after the final measure containing notes, click Tools / Remove empty trailing measures.