When selecting or hovering over a component/group, you’ll notice there are inference icons at the corners of the component/group’s bounding box to help you better move the component/group. You’ll see a gray dot at every corner of the box. These are grips that you can grab to move the object.When you hover over a corner obscured by the object itself, SketchUp temporarily makes the object transparent, allowing you to use that corner as a grip .
Tip: When a component/group is selected and you are not hovering over a corner grip, you can cycle through visible grips by pressing the down arrow key, allowing you to switch between: corners of a group, midpoints of a group, side centers of a group, or the center of a group.
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