When adding a new work location, go to Administration - Company and select the Work Locations tab.  For already saved locations, click the Edit Icon under the Action column.

Verify that the Set Work Perimeter for This Location is enabled.

There are two options in making the geo-fence:

1. Putting in the radius in meters:
   1. Type the number and unit of measure of the radius of the area needed in the Radius(A) section. Then click Save (B).
      
2. Drawing around the perimeter of the location.
   1. Click the Click to Draw on Map (A) button.
   2. Click the Draw a Shape (B) icon from the set of icons on the upper middle part of the window.
   3. Draw around the perimeter of the location/area/building (C).
   4. Once done, click Save (D).
   5. To remark the area, click the Reset Drawing(E) button and start again by clicking the draw on the map icon.