Let's say you have two overlapping objects. You want to get the object that is below, but you don't want to move the one that is on top.
- You right click (Windows) or Control + click (Mac OS) on the object you want to select and a contextual menu will appear.
- Go to Select and you will see a list of options of things you can select. It should appear as in the illustration below. Choose the option you need. The last two options in the Select sub-menu will appear if an object which was part of a group was selected before you made the contextual menu show up.