Edge Commands
These commands allow you to perform complex operations on edges. For example, you can extrude an edge by using the Extrude command. Or you can split an edge by using the Split Edge command. These command are found in the Command Palette when the Component Selection is set to Edge and you have a edge or multiple edges selected. The Command Palette is located on the right side of the screen right below the Camera Controls (see below).
Modeler Interface

Isolation Commands
Isolate
Tap this button to isolate (solo) the selected mesh and make the rest of the scene invisible and locked.
De-isolate
Tap this button to de-isolate the selected mesh and unlock the rest of your scene and make it visible.
Selection Commands
Grow Selection
Tap this button to grow the selection.
Shrink Selection
Tap this button to shrink the selection.
Invert Selection
Tap this button to invert the current selection and select all connected edges that are not selected.
Select Shell
Tap this button to select all connect edges to the current selection.
Clear Selection
Tap this button to clear the selection.
Modifier Commands
Add Subdivision Modifier
Tap this button to add a subdivision modifier.
Remove Subdivision Modifier
Tap this button to remove the subdivision modifier.
Add Mirror Modifier
Tap this button to add a mirror modifier.
Remove Mirror Modifier
Tap this button to remove the mirror modifier.
Modeling Commands
Knife Tool
Tap this button to activate the knife and cut edges to create new faces, edges and vertices.
Align Edge
Tap this button to activate alignment mode. Then tap or drag on another mesh to align the selected edge to that mesh's surface.
Fill Hole
Tap this button to fill the hole that is touching the selected edge.
Extrude Edge(s)
Tap this button to extrude the selected edge(s).
Loop Cut
Tap this button to create mulitple loop cuts around the selected edge.
Split Edge(s)
Tap this button to create a new mesh with the selected edges and remove them from the selected mesh.
Bridge Edges
Tap this button to bridge the selected edges.
Bridge Edges only shows up when you have two edges selected.
Shading Commands
Harden Edge(s)
Tap this button to harden the selected edge(s).
Soften Edge(s)
Tap this button to soften the selected edge(s).
Destructive Commands
Delete Edge(s)
Tap this button to delete the selected edge(s).
Dissolve Edge(s)
Tap this button to dissolve the selected edge(s).
Collapse Edge(s)
Tap this button to collapse the selected edge(s).