Whether you just need to get something out of your way for a moment, or you are precisely controlling what entities you see in drawings, SketchUp allows you to control the visibility of geometry.
Use the Hide command to clear entities out of your way while working. Hiding is a utility, a temporary solution to the visibility of geometry. This command allows you to get something out of the way for a moment, then quickly bring it back. You can hide an entity several ways...
Now, to bring the hidden entities back...
Hidden entities within groups and components are slightly more difficult. The Unhide All command does not reach through groups. In other words, if you have hidden entities contained in groups, you must be in the group, then run the Unhide All command to bring them back. Turn on Hidden Geometry and Hidden Objects to find the missing pieces.
Tags (formerly layers) are a permanent solution to the visibility of geometry. Tags are easier to control, more predictable, and unlike hiding they reach through nested groups. This makes them a more powerful and reliable function than simply hiding geometry. While SketchUp is a flexible 3d modeling program that just about anyone in any industry can use to visualize designs, here's how a few guidelines on how to use tags as architects and interior designers...
To demonstrate tags, I have added three tags: SHAPE_Cube, SHAPE_Sphere, and SHAPE_Pyramid. I assigned the tag to the corresponding component in the Entity Info dialog. You can see their visibility toggle on and off.
Unfortunately, you can only assign one tag to an entity in SketchUp. No problem! You can get around this by adding a tag to each nested group. We have already broken the model into a hierarchy of shape, color, and size. Now we just need to assign shape, color, and size tags to each of the nested groups.
Starting at the base level of SketchUp, in other words not "clicked into" any groups...
Double-click into each Shape group...
Double-click into each Shape group, then double-click into each color group...