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495 bytes added ,  13:27, 9 August 2020
Text replacement - "<cmd>" to "{{cmd|"
= Command line =
You start Mark IV with the '''context''' command, and Mark II with '''texexec'''. The two programs are not the same, and even though they have mostly the same command line, there are some differences. Mostly, this is because '''context''' is still lacking a number of options of texexec like for example --passon (those will probably be implemented at some point in the future), but it also parses the command line differentdifferently. You must remember to always give the full name of the options, and then the effects should be almost unnoticeable.
= Parameter processing =
= Paragraph formatting =
Mark IV extends the <{{cmd>|definefontfeature</cmd> }} to make full use of the lua opentype engine by adding
'''mode=node''', and various opentype tags features that you want on or off. In the distribution, there is only one case of this:
= Fonts and Typescripts =
Typescripts in Mark IV never specify any encoding at all (Unicode is mandatory).
= Metapost =
This means there are two things you have to watch out for:
# You should load the MP packages you need in <{{cmd>|startMPinclusions</cmd>}}..<{{cmd>|stopMPinclusions</cmd>}}; not inside a graphic.
# You have to make sure that you do not re-state equations that were already solved in a previous graphic.
These are in fact the exact same rules that you have to adhere to in mkii MkII if <{{cmd>|runMPgraphicsfalse</cmd> }} is active.
Another difference is the way text is handled in mkivMkIV. In particular, color (<code>withcolor</code>)
is not applied to metapost text. For example,
currently does <b>not</b> work in mkivMkIV. However,
does work. This second solution works both in mkiv MkIV and in mkiiMkII.
(Note that <code>\color[red]</code> can be abbreviated <code>\red</code>.)
= Images =
The official way of placing image in in mkivMkIV:
mkii The MkII way was
= Logos =
The logo commands (<{{cmd>|definelogo</cmd> }} c.s.) do not exist in mkivMkIV; use layers instead.
= Itemizations =
''Bare'' <{{cmd>|item</cmd> }} paragraphs (without enclosing list) are not allowed.
= Nomarking/Select =
<{{cmd>|nomarking</cmd> }} is currently broken and will likely be removed from mkivMkIV; use <{{cmd>|select</cmd> }} instead:
= Table of Contents =
If you want to modify [[Table of Contents|TOC]] you may find that <code>level</code> parameter has recently(02/2010) and probably for ever no effect in [[Mark IV]]. You may use <{{cmd>|placelist}}[chapter,section]</cmd> instad instead of <{{cmd>|setupcombinedlist}}[content][level=2]</cmd>.
= Grid typesetting =
The implementation in MkIV is completely new, and various details have changed. The most important difference seems to be that the new grid by default is less tolerant for superscripts, but it can be made so by using <{{cmd>|setuplayout}}[grid=tolerant]</cmd>.
= External figures =
There was a change in the default path search for external figures, but I don't know the exact details off-hand.
IIRC, the main problem is that texmf tree images are now found before local images. To change this ordering,
use the <tt>location</tt> key to <{{cmd>|setupexternalfigures</cmd>}}:
= Trialtypesetting =
The macros for (de)activating trial typesetting (<tt>\trialtypesettingtrue</tt> and <tt>\trialtypesettingfalse</tt>) have been changed. They are no longer part of a <tt>\newif</tt> statement. The new names are <texcode>\settrialtypesetting</texcode> for activation and <texcode>\resettrailtypesettingresettrialtypesetting</texcode> for deactivation. = Programming internals = == <tt>read*file</tt> Commands like <tt>\readlocfile</tt> no longer default to a <tt>.tex</tt> extension, explicit file extensions are now required. = Sectioning = In MkIV, after <tt>\setuphead[section][placehead=no]</tt> there may still be some output on the page, because MkIV stores the reference target(s) to the section in an invisible box on the current page. Use <tt>\setuphead[section][placehead=hidden]</tt> if that interferes with the rest of your typesetting. [[Category:Tools]]

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