There’s a growing number of trackers and directives, as well as \show… commands. I’m sure there are some that I could/should use and just don’t know, and there’s just too much to try. Which are your hidden gems or favourite tools? I’ll start: \showlayout: inserts 4 pages of layout dimensions \showmakeup: values of many details, e.g. distances and kerning \showgrid: line grid for grid mode \showframe: all frames \showboxes: draw frames around a few areas \showsetups: list of variables \showbodyfont: variants of tha active font family \showbodyfontenvironment: values of relative sizes \showsymbolset[name]: list of symbols \showstruts \showcolor, \showcolorcomponents \showpalet, \comparepalet \showexternalfigures \showtrackers – or "context --trackers" \showdirectives – or "context --directives" Trackers: builders.hpack.overflow – mark under-/overfull hboxes hyphenation.applied.visualize – show hyphenation https://wiki.contextgarden.net/Trackers/typesetters.suspects https://wiki.contextgarden.net/Trackers/visualizers.justification Directives: pdfview.method=auto (in contextcnf.lua) to change --autopdf default logs.errors=* – make warnings errors(?) logs.quitonerror=* – stop at every error references.bookmarks.preroll – expand(?) macros in bookmarks backend.pdf.nounicode=X – obfuscate text Let’s fill in and complete https://wiki.contextgarden.net/Trackers (the list was made in 2012 and is quite outdated) Hraban