See the Offset
topic in the Wiki.
A drawing needs two or more layers.
Turn off the "Skip Define Distance step" option, then "Finish".
Reactivate the Offset tool. You should now have a "Layer" option in the Local Menu.
Select "Layer". It should bring up the "Current" and "Source" options.
If you choose "Current", select the Layer you want the Offset to go to.
Specify an Offset distance, select the object to Offset and then pick a side for the Offset to be placed.
Offset was updated several years ago to be the same as the Offset tool in AutoCAD.
Designer, Deluxe, (Professional, Expert, Basic), Platinum
Windows 10 Pro (1803), 64-bit