Pdeditor_XH facilitates viewing and editing the page data in the administration of CMSimple_XH. It also provides some diagnostics regarding potential desynchronisation of content and pagedata (what is supposed to never happen in CMSimple_XH ≥ 1.6). It is meant as an alternative to editing pagedata.php resp. since CMSimple_XH 1.6 the pagedata sections in content.htm) manually, so it should be used by experienced users only, who know exactly, what they are doing. It's not a tool for unexperienced users! These should manipulate the pagedata via the interface provided by the respective plugins only (often a tab above the editor).