Straighthen and Arch

Menu:
Geometry.Straigthen top
Geometry.Straigthen base
Geometry.Arch
Tcl routine:
straightenbase straightentop archbase

Description

A single stranded part can be easily made into a straight line by selecting (a base of) it, and invoke the straighthen menu. If a base of a helix is selected, the single stranded areas at the top (Straigthen top) or at the bottom (Straigthen bottom) of the helix will be straightend. A single stranded area can also be made to take a slightly curved form using the 'Arch' menu.