layers, what am I missing?

[NewAndClueless]

Hello,

 

I finally purchased a pro license for my detached garage/office project but I am having trouble doing the simplest tasks. I have the floor plan all done and now I want to add dimensions for the slab and rough in plumbing but all the KB tutorials do not match my 2017 version. I drew CAD lines and tried to figure out how to "move them" to the plumbing layer but I cannot find how to do that. 

 

I would really like to just dimension my slab and plumbing rough in based on my floor plan so if someone has a better suggestion on how to do this please let me know. I also do not see an MEP toolbar and cannot add it.

 

Thanks for any help!