View tab > Visibility panel

Use the options in the Visibility panel to control the visibility of objects in the graphics window.

Blanking

Use the options on the Blanking menu to set the parts of the model to blank (temporarily undraw). Select from:

Unblank

This option displays all objects that were previously blanked.

All blanked objects are displayed and selected. If you want to unblank only a few objects, deselect them using Shift+Click, and re-blank the remaining selected objects using View tab > Visibility panel > Blanking > Blank Selected.