Begin by drawing in and positioning the dadoes for the front and back in the top, bottom, and sides — these will be cut with an 0.0625″ endmill and if done as pockets would need to be at least 10% wider — rounding up to 0.07″ would be one option, but is problematic in terms of positioning. An alternative is to draw in a line and cut as a follow path operation, trusting that the endmill will cut a bit wider than its nominal dimension due to runout and expecting the sheet good to probably be slightly undersize. For simplicity’s sake, we will do the latter.
Use the Polyline tool to draw in a line beginning and ending at the corners of each edge which you need a dado along:
Click Done after drawing a line, select it:
and then edit the positioning information to place it where desired:
Note that you will need to roundup or down (used 0.063″) and the line should be positioned at
0.125″ (inset) + (0.0625″ (dado thickness)/2)
0.125″ + 0.03125″ ~= 0.156″
Repeat this process for each dado (note that you may need to deselect and reselect to get in and out of the various modes, esp. if you choose to duplicate geometry):