Move
Drag it with the mouse in Selection mode .
A selection
Press Space-bar once or move the mouse pointer toward the center until a blue rectangle appears and drag
Click the center of the object and drag.
Rotate
A selection
Press Space-bar twice or move the mouse pointer over the selection until a blue rotation symbol appears and drag.
Click the center of the object and drag.
Select Edit > Transform > Rotate in 3D > ... and drag .
Zoom
Set the magnification of the molecule on the canvas by the Zoom buttons.
If you have a mouse with a wheel, hold down the Ctrl key, and then scroll the wheel to zoom in or out.
Click Zoom In on the General toolbar and click on it as many time it is necessary or
Select a level from the Zoom tool's drop-down list (or from the View > Zoom Level menu) or to All. (The All option zooms in or zooms out the objects to the full size of the canvas.)
Click Zoom Out on the General toolbar and click on it as many time it is necessary orm
Select a level from the Zoom tool's drop-down list (or from the View > Zoom Level menu) and set the magnification to a smaller value..
Press F6 and drag vertically to zoom.
Scroll the mouse wheel over the canvas while pressing the Ctrl key.