Both of those can be accomplished via either the piano roll view or the editable notation view. I most use the piano roll view so in that mode I would do the following:

#1 - just grab the note(s) that you want to move and move them up or down.

#2 - If you know guitar then just pick notes that will work for the desired position. For instance and open G would be G-B-D-G-B-G and a barred G would be G-D-G-B-D-G. If you don't know guitar then just ask as there are a number of guitarist here that will help you.

Principal: Your child always causes trouble in school.
Me: My child causes trouble at home, do I ever call you?

64 bit Win 10 Pro, the latest BiaB/RB, Roland Octa-Capture audio interface, a ton of software/hardware