< Inside ConTeXt | Visuals >
There's a whole lot of commands that help you analyzing and debugging your ConTeXt documents. Most of them start with \show...:
Layout
\showlayout : add four pages that show margins, layout sizes etc.
\showmakeup : ?
\showframe : ?
\showgrid : make line grid visible
\showsetups : type a list of all defined sizes (variables) and their values
Fonts and Type
\showbodyfont : actual bodyfont family with all variants
\showbodyfontenvironment : draws a table that shows which point sizes match the relative sizes
\showsymbolset : ?
\showcharacters : list of available chars of actual bodyfont encoding
\showaccents : shows A-Z and a-z with all available accents
\showstruts : make invisible characters visible