I’m a bit of a neophyte with Sketchup, but it’s helped me immensely. One thing that I’d like to do is to edit multiple objects simultaneously. For example, I’ve designed a simple storage cabinet with several shelves inside. I’ve decided to shorten the depth of the shelves by an inch. The only way that I know how to do this is to select each shelf, explode it, resize it, and regroup it. Lather, rinse, repeat for each shelf. It would be very nice if I could somehow resize all of them at once. Is this possible?
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Make one shelf, make it a component and copy it to the other positions. Any edit will happen to all instances.
Double click to enter edit mode rather than exploding everything.
First, you don’t need to explode groups or components to make changes. Simply open it for editing.
If you had made the shelves copies of a component, editing one will result in all other copies being edited, too.
Box beat me to it.
Aha! So now I know what a component is good for. Thanks for the help, guys!
You know just one of the things a component is good for. 
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No, I’m completely educated now. There’s nothing I don’t know.
…till I’m back here in 20 minutes totally confused.
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That’s how it goes for me, too.
Yes I really wish there was a way to edit multiple objects at the same time, but not by making components.
For example if you have a table made of several nested groups like table top, legs, feet, edging, etc. and you want to quickly quickly select all edges on one corner to move and give the table a slight angle at one end or something, this ability to edit multiple groups or compnents would be very useful. In comparison, Rhino has ‘move edge’ or ‘move face’ which allows you to edit multiple objects at one time like this. Super useful!
I’m used to this in PowerCADD with the Move Points tool, and found similar capability in a plugin for SketchUp on SketchUcation called T2H Stretch by Area. Visual feedback is lacking, as I recall, but it does work.
Ok thanks for the tip, I’ll have to try that. Still i think this is a very useful feature for most users, so would be great if adopted as a standard feature.