While there are pages and pages of system and frills variables, there are still many missing.
When viewing the Status Window, there are many attributes and dimension values that are not accessible via the % or ! variables.
E.g. !tbcypos - tabular cell y position.
Strangely, there IS tbcxpos - but not the ypos?
Rather than list variables that aren't present, it would be easier to simply make ALL Status Window values available as % or ! variables.