In the ordered environment, when working on a profile or sketch, in the View→Views group, click the Sketch View button 
.
Note:
This command is only available in ordered when drawing a profile or sketch.
In synchronous, on the View→Views group, click the Sketch View button .
Note:
This command is only available in synchronous if a command plane exists, either implied by a command or globally locked.
Tip:
You can also type Ctrl+H to rotate the view normal to the profile or sketch plane.