, and then using the up or down arrow buttons 
to move to an appropriate plane.Form: Set 2D View
It is sometimes easier to build a model while working in 2D elevation or plan views. Use the Home > View > Set 2D View command to access the Set 2D View form and set the active window to a 2D View.
Note: It is also possible to choose a plane by clicking one of the 2D view buttons , and then using the up or down arrow buttons to move to an appropriate plane.
Click the Home > View > Set 2D View command to access the Set 2D View form.
Select the X-Y, X-Z or Y-Z plane. Fill in the edit box with the appropriate Z, Y or X coordinate.
Select the View Direction: Front or Back Face.
Click OK.
Use rubber band zoom to zoom into a window. Clicking once anywhere in the window will restore the original view.
Also See