Orbit

In the rotation mode you can give the model a rotation by pressing the left mouse button, moving the mouse in any direction and releasing the mouse button again. After releasing the left mouse button, the model starts rotating. Pressing the left mouse button again stops the rotation.

Use the toolbar icon or the menu bar option Settings > Navigation > Orbit.

Press F5 to refresh the screen. Refreshing centers the model and puts it back into the default view (Aft SB Top view). The entire block is shown after the refresh, even when only certain part(s) of the block were shown originally.