circle center line(Like Plus symbol and after circle 4 sides 5mm extra length)

[johnpieter]

how to place center line to the multi selected circle.like inside of circle need to place center line(Like plus symbol).and 4 edges its place 5mm extra after the circle.i am asking for holes place.

[Tharwat]

It's the command

 

dimcenter

 

Tharwat

[Lee Mac]

Another:

 

http://lee-mac.com/centreline.html