Document layout and layers/Visual debugging

Some command can help for visual debugging

Basics

• \showlayout : add four pages that show margins, layout sizes etc.
• \showsetups : typeset a list of all defined sizes (variables) and their values
• \showmakeup : show some otherwise invisible markup
• \showframe : show frames of text area, layers, boxes etc.
• \showlayoutcomponents : To allow Acrobat Reader users (among others?) to make layers visible/invisible at will, add this command at the start of your file.

Show attributes of visual elements

With \showrootvalues and \showinstancevalues

• \usemodule [setups]
  
  \starttext
  
  % \setuphead [chapter] [..,..=..,..]
  \showinstancevalues [head] [chapter]
  
  % \setuphead [..,..=..,..]
  \showrootvalues [head]
  
  \stoptext
  

• 

Grid, Layers and Column Sets

• \tracelayers : show boxes of layers
• \tracecolumnset : ?
• \tracetextareas : ?
• \showgrid : make line grid visible
• \tracegridsnapping : ?