You should provide some more information. What do you want to copy? How are you trying to do that? What Musescore version and operating system are you using?
For example, if you select a single note without having the blue frame around it (for example, just the note head), yes, that won't work. You have to press Shift + Arrow down or up (or right to select more than one note) to make the frame appear and then C&P works.
Yes, but the chapter in the manual is not quite accurate, especially concerning this suspected case. It must be a range selection, even if it is a single note.
Look at the first picture of the linked page, there is only the note head selected. Then C&P doesn't work.
It must look like this if you want to copy and paste a single note:
Comments
Try following the Handbook on the topic Copy and paste:
https://musescore.org/en/handbook/4/copy-and-paste
You should provide some more information. What do you want to copy? How are you trying to do that? What Musescore version and operating system are you using?
For example, if you select a single note without having the blue frame around it (for example, just the note head), yes, that won't work. You have to press Shift + Arrow down or up (or right to select more than one note) to make the frame appear and then C&P works.
.. and to add to HildeK's hints about selecting, here is a link to the MS4 Handbook chapter about "Selecting elements":
https://musescore.org/en/handbook/4/selecting-elements
In reply to .. and to add to HildeK's… by DanielR
Yes, but the chapter in the manual is not quite accurate, especially concerning this suspected case. It must be a range selection, even if it is a single note.
Look at the first picture of the linked page, there is only the note head selected. Then C&P doesn't work.
It must look like this if you want to copy and paste a single note: