File Tabs
When you have more than one file open in MuseScore, the Ctrl/Tab key combination is a useful way of shifting you through the tabs from left to right. It would also be useful if the Ctrl/Shift/Tab combination shifted you back through the tabs in the reverse direction. This combination is quite common in other applications.
Comments
see also: #66961: Shortcut to change tabs *right to left* needed, like Ctrl+Shift+Tab