You can use the Apple Pencil, mouse, or trackpad to select any geometry in the design space. 

Once you select a sketch, closed sketch, face, body, or edge, you can modify it with different tools. Depending on what you select, a custom menu with suggested tools will appear so you can immediately adjust the selection.

Take a look at this basic guide for selection:  

Select a face, sketch, or edge		Tap once		Click once
Select an entire body		Tap twice		Double-click
Select multiple items, one by one		Tap each item without interruption		Press the Shift key and click each geometry
Select all		⌘ A		⌘ A
Deselect all		Tap an empty area ⌘ .  esc		Click an empty area ⌘ .  esc
Select an area at once with the Area Selection tool		Long-tap the screen and drag the Apple Pencil across the space. You can filter the selection based on item type — body, edge, or face.		Click anywhere in the design space and drag the pointer across the space. You can filter the selection based on item type — body, edge, or face.

Area Selection tool 

As mentioned in the table above, you can trigger the Area Selection tool to select multiple geometries at once in a selection box. Depending on the direction you drag the Apple Pencil or pointer, the selection type changes: 

• Drag to the right to select geometries that are completely included in the selection box.
  
• Drag to the left to select crossing geometries—objects that aren't necessarily contained in the selection box, but cross the box's boundaries.

Once you make your selection, you have the option to filter the selection based on item type: "All Items," "Bodies Only," "Faces Only," or "Edges Only."

If you're using the Apple Pencil, use your finger to tap the selection filters while holding down the selection box with the Apple Pencil.

If you're using the mouse or trackpad, press the Tab key to cycle through the selection filters. Or, press B for "Bodies Only," F for "Faces Only," and E for "Edges Only." 

Information about selections

Each selection you make is indicated with a blue color, and any measurement related to your selection appears at the bottom of the screen.