This package offers a simple way to develop and deploy Plone themes using the Diazo theming engine. If you are not familiar with Diazo, check out the Diazo documentation.
This version of plone.app.theming (1.2.X) ships with Plone version 5.0 or later. For Plone 4.3 please use plone.app.theming 1.1.X.
It comes with a user guide, reproduced below, available through the theming control panel.