Offset each selected face as a stand-alone face, without changing the face sizes.
Required
Step 1 
Select one or more faces or objects. In this example, all the indicated faces were selected.
Set the General Offset to 10.
In this example the default Keep Original is
applied.
The offset side can be flipped by clicking on the arrow.
If this is the final result, press OK
or Apply 
in the Feature
Guide to complete the function.
Optional
Step 1 
If you want to define non-uniform offsets, proceed to Optional Step 1.
When completed, the Offset surface will appear in the Feature Tree as follows:
