Main action Selects one or more entities
Shortcut key Spacebar

The Select tool is the simplest of all the SketchUp tools.

Using SelectEdit

To use Select to select an entity, just click the item. To select more than one entity, hold down Shift while selecting. To select everything that is inside a certain view, drag Select across the modeling window from left to right, forming a rectangle. Release Select, and everything inside the box will be selected, and the box will disappear. Make a box from right to left to select everything that is in or touches the box. To select everything, press Ctrl-A.