The Options menu

Page setup
Set the size and color of the page
Structure settings
Change the settings for current or new structures.

Show double strand by connection
The currently selected doublestranded area will be displayed by drawing a box around the single strands, and connecting the boxes with a line. This action can be reversed by the "Redraw helices". option below. This construct is not saved in a skeleton file.
Redraw helices
Redraw all selected helices.
Unformatted Single
Mark single stranded area as unformatted
Reformat Single
Mark single stranded area as formatted
No auto redraw Single
Do not automatically redraw the single stranded area when moving a nearby helix.
Auto redraw Single
Automatically redraw the single stranded area when moving a nearby helix (default).

Base numbering
Add base numbers to the current structure
Box bases
Draw a box around the currently selected bases
Connect bases
Connect the currently selected base to another base. The program will promt for the base to connect to.
Beads
Add ovals of differing size to each base
Restore text
Restore the original base sequence of the currently selected structure.