Betafab GUI
===========

The graphical user interface of the β-peptide builder can be found in the Plugins menu of PyMOL. The main window is
shown in the figure below.

.. figure:: _static/betafabgui_explanations.png
    :figwidth: 100%

    The Betafab GUI window explained

Building blocks (α- or β-amino acids, as well as Ace and NMe capping groups) can be added in three different ways
to the sequence (top of the window):

    #. manual input of either a simple amino-acid or a whole sequence (comma separated amino acid abbreviations). The
       notation is the same as used by the command :ref:`betafab2_manpage`, see :ref:`simplified_residue_naming`

    #. one-by-one addition of amino acids using the drop-down selectors.

    #. using the quick-access buttons (currently for Ace and NMe capping groups and a test peptide)

The central part shows the peptide sequence and allows a simple means for editing. Amino acids can be removed,
reordered and even modified. By double-clicking on cells in columns 3-8, properties of the residue (type, sidechains,
stereoisomers) can be changed using drop-down selectors.

The desired secondary structure can also be given in the last column. The drop-downs display the list of the known
secondary structures in the :ref:`secstruct_db`.

The peptide sequence can be built by supplying a PyMOL model name for it and pressing the "Build" button.

The built model can be saved to .g96 or .crd files using the corresponding push buttons.