or '''Menu '''>'''View '''>'''Undo View'''<br /> Reverts viewport to previous view angle and distance.
[[File:viewfour-perspective_tnport-view_tn.png]] SPLIT VIEWPORTÂ
or select '''View '''>'''Split Viewport'''<br /> Displays a four-port view of the project workspace.
[[File:viewsingle-perspective_tnport-view_tn.png]] MERGE VIEWPORT
or select '''View '''>'''Merge Viewport'''<br /> Merges the four-port view into the normal single-port view.