This question has come up more than a few times in our service department. A customer purchases new software and expects to find it listed with their existing software in their account. To their surprise, it never shows up in the list with their existing seats, leaving many to wonder what happened to their product. At this point, things get interesting.
Each year, Autodesk releases its new version of products, including AutoCAD 2021. As in previous updates, AutoCAD is updated with new commands, and even some changes to the existing commands have occurred. The ARRAY command change in 2013 and the new Layers command before that are just a couple of notable examples of past changes.
I have always liked the Trim and Extend commands in Autodesk Inventor, and now AutoCAD 2021 incorporates the same simplified behavior. As you might remember in previous versions, when using the Extend or Trim command in AutoCAD, you were always prompted to select the boundaries first. Now in 2021, AutoCAD detects the boundary(s) automatically, saving the step of having to choose one or more items before selecting the actual items to Trim/Extend. Another nice change, is that the command default to a fence selection, making it ideal for selecting groups of objects.