The View Menu

Toolbar/Menu bar/Status bar

Here you can switch on and off these elements.

Zoom in

Enlarges the structure(s) painted.

Zoom out

Scales down the structure(s) painted.

Zoom 100%

Zooms to the original size.

Properties

Here you can enter some propeties (e. g. if atom numbers shall be drawn) which determine the look of the molecule.