Left-click

Selects a part

Press CTRL+left-click

Selects additional parts or deselects a part

Hold the left mouse button and drag from right to left

Hold the left mouse button and drag from left to right

Selects all the parts that are partially contained by the bounding box

Hold the right mouse button and drag

Flies in or out

Drag down to fly out, and drag up to fly in

Hold the middle button and drag

Rotates the structure

Hold the middle button and drag. Then, release the mouse button.

Structure continues to rotate

Click in the graphics area to stop the rotation

Press SHIFT+hold the middle mouse button and drag

Pans the view

Press CTRL+hold the middle mouse button and drag

Zooms in or out

Drag down to zoom in, and drag up to zoom out. Drag right to rotate clockwise, left to rotate counterclockwise.

Double-click the part

Zoom to part

Double-click in the graphics area

Zoom to model