Context Menu could not display completely under OS X.
New Ideas : Sibelius Feedback Community 2016-01-28
Summary:
I am wondering whether any of you had met this issue yet. I met this issue with Sibelius 7 / 7.5 / 8 / 8.1 under OS X Mavericks / Yosemite / El Capitan; However, this bug does not exist if under Windows. Please address this issue to make sure context menu displays as what they look like on Windows: Multi-column and complete display.