0:03 When you need to expand or contract a series of edges, reach for the offset tool.
0:10 To start, we can offset a single surface, which effectively works on all the edges of that surface.
0:19 Click once on the surface and move the cursor inward or away from that face and click to finish.
0:29 You can also pre-select specific edges for the offset tool, though the edges must all be connected and on the same plane.
0:40 Hold the Shift key while selecting edges, to add-to, or subtract-from, your selection.
0:47 Now you can offset just these edges.
0:53 Like other tools, you can start an offset, then type in an exact distance.
0:59 For example, I might offset this window frame outward by 3", or one of these window surfaces inward by 1".
1:07 The offset tool will also remember the last distance you used, which is currently 1 inch for me, so double-clicking on other surfaces will offset that same amount.
1:21 By default, offset will resolve overlapping edges, removing them.
1:27 If you wish to maintain all edges however, you can override this function by pressing the Alt key on Windows, or the Command key on a Mac.
1:38 One more tip that will help you use the offset tool.
1:42 As always, you can infer to other geometry, but the inference will be to the initial edge you click on, so it matters which edge you choose.
1:54 Let’s say I was trying to align this door frame to the windows on this wall,
1:59 I might start the offset from this top edge to align with the side window,
2:04 or, to align with the window above the door, I’d start the offset from a different edge.