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\showmakeup added
=Visuals=
There are a lot of helpers which make things visible in the PDF. Mostly they have a form of <tt>\show...</tt> commands.
==Layout==
==Fonts==
<cmd>replacemissingcharacters</cmd> will replace characters missing in the font(s) with squares respecting font switches (<tt>\it</tt>, <tt>\bf</tt>). Underneath the squares are wanted characters, so though invisible, one can still search (in searchable PDF editors) or copy them to the text editor to see the missing characters.
==Paragraph and page composition==
<cmd>showmakeup</cmd> shows how TeX composes text to paragraphs and paragraphs into pages. It inserts PDF layers in the output, which can be switched on/off. By default there are glue, hbox, kern, penalty and vbox layers. See <cmd>showmakeup</cmd> to see other options.
[[Category:Basics]]
[[Category:Tools]]
[[Category:ConTeXt]]
