In Illustrator and InDesign I love to set a Nudge value ('keyboard increment') corresponding to the grid I am working with.
Is this available in Muse? It would working with Muse much more easy and accurate.
I got it what you are coming from.
However, this isn't available in Muse yet. The character
The character movement in Muse is done only by 1px per keystroke.
However, you can get this listed in our – Adobe Muse CC: Feature Ideas page and also get it upvoted for increasing its priority.