I forgot about this response and the content of it. So I'm going to make this blog post to hopefully reinforce the concept so I might remember it better.
When in a tree view, like the one in Civil 3D Prospector;
The number pad keys do the following:
- * Expands all of the branches below the currently selected branch.
- + Expands the currently selected branch.
- - Collapses the currently selected branch.
- Right Arrow Does the same thing as +
- Left Arrow Does the same thing as -
- Holding the CTRL Key and Up and Down Arrows will scroll the current view.
- Letter Key Will go to the next branch with that starts with the entered key.