This has been a longstanding request and there’s been various talk about it now and again, like Feature Request: Options for Measure Tool.
I’ll pretty much certainly add this, and I think I have a good idea for how. I’ve been kicking around ideas for how to add tool options to the interface without making it feel too much more complex, and I think I have a good grasp of the problem.
I think it may be awhile before it’s actually implemented and ready in front of users though… it’s not in any of my current roadmaps. I suspect I’ll try and tackle Copy + Paste first, and there’s some stuff in front of that feature as well… I definitely wish there were more of me to help out with Shmeppy sometimes 
, so much to do, and I’m not particularly quick.