The new "group" feature lets you quickly and easily group objects together so that they can be managed as if they were a single object.
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The power of "Grouping"
Suppose you want to use the move command to position a house on a lot. Without groups you would have to select the house pad, back deck, pool, and the front porch. If instead you make a group of these objects, then you only need to click once and they are all selected.... ready to be moved.
Groups are very easy to create. Just select the objects that you want in the group, then right-click and select "Group".