The 3D Ribbon tab is shown below.

View

Zoom into a window.

Zoom in on the current view. This will magnify the view of the sheet.

Zoom out on the current view. This will show more of the sheet.

View all objects. The view will adjust so you can see all objects in the scene.

View from a standard 'camera' position. This is viewing along the negative x,y,z directions.

View the scene from the front. This is in the negative z direction.

View the scene from the left. This is in the positive x direction.

View the scene from the top. This is in the negative y direction.

View the scene from the rear. This is in the positive z direction.

View the scene from the right. This is in the negative x direction.

View the scene from the bottom. This is in the positive y direction.

Tooggle the visibility of the grid. This turns it on/off

Pan

Pan the view to the left. The will move the viewport so the contents of the view are shifted to the left.

Pan the view to the right. The will move the viewport so the contents of the view are shifted to the right.

Pan the view up. The will move the viewport so the contents of the view are shifted to up.

Pan the view down. The will move the viewport so the contents of the view are shifted down.