Background

When connected monomers are expanded (in Molecules mode), the flip options are enabled only for:

1. the whole structure,
2. the terminal monomers with only one AP occupied (only one connection established) and
3. the continuous selection of a structure that contains the terminal monomers with one AP occupied.

Requirements

1. For any selection that includes one or more continuous monomers, flipping options (horizontal and vertical) should be enabled.

2. The structure should change using the same logic for the flipping of molecules (e.g. changing of the stereo-bonds)

Example:

Horizontal flip result: