[mcrossy]

Hello, 
I'm experiencing some crashes (actual version 3.5.6) while Editing a sheet page. 
In particular I was writing some manual notes over a custom pentagram, and the programa seems slow and heavy, and crashes after a certain number of writings.
Also, anotger things that is particularly annoying is that, if I want to erase something where there are for example signs and staves, it is impossibile to select what to erase and what has to remain, unless I temporary move the staves, delete what's wrong, and reposition the staves to their location.
Is there a way to "Lock" an object that I don't want to touch in the page? Maybe this could be a suggestion for a New feature... ;-)

Thanks in Advance!