Enlarges the structure(s) painted.
Scales down the structure(s) painted.
Zooms to the original size.
This lays out the structure according to standard rules (Structure Diagram Generation).
Flips either the selection or the complete structure (if no selection is done) around the horizontal or vertical axis.
Here you can show hydrogens on all or no atoms. Note these are settings which can also be achieved by choosing "Explicit Carbons" and "Show implicit hydrogens" in Edit->Preferences.