Supports Development in OPM

Hi Gents

Where I can find the help or manual for the development on OPM, specially for "Supports" module, because I want make some dummy in the pipe line and make them show a MTO in ISO drawings. the dummy can include the pipe shoe type, line guide type, line stop type etc. could someone have any suggestion?

Further it's very helpful if there are some document to show how to develop our own supports type as in the picture above?

Any idea?