Hi, I modeled up a 3-d sketch of a frame that I am using for a salt flats racer.  I went in to do the weldment command and realized I didn't it mm instead of inches (rookie mistake).  I was wondering if there is a way to make my 3-d sketch go to inches.  I read online about scaling but I am wondering if I don't have that command because I have the student version (90 day trial).  Can someone out there help me convert this to inches?  And let me know how you did it.

Thank you for your time