The Reset menu lets you reset the pan, zoom, rotation, or all three orientations together to their default settings.
View restores the default view orientation, which is the -Z view with the zoom level set to include all visible entities in the Display window, and sets the rotation point to the center of the displayed entities.
Pan moves the Display window image along the screen X and screen Y directions so that the rotation axes are centered in the Display window. The body coordinates of the rotation point are not changed.
Zoom pans the image and changes the zoom level so all visible entities are shown in the Display window.
Rotate turns the image about the rotation point to the -Z view. The image is not panned or zoomed and the rotation is not moved.
Rotation Point resets the center of rotation.