Update-o-bump, I've added values to the constants (not to say you should use them!)
Also, everything is a link now. You can simply link to every value or method by using the table's short name (elem for element, ren for renderer) and add a . and the value.
For example,
http://boxmein.net/tpt/tptelements/reference/lua-reference.html#tpt.graphics_func
http://boxmein.net/tpt//tptelements/reference/lua-reference.html#ren.PMODE_FLAT