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122 bytes removed ,  03:37, 8 June 2020
Minor edits to make the article MkIV only
multiple modes can be simultaneously enabled or disabled, and the status of multiple
modes can be checked easily. Moreover, modes can be set from a command line
switch. As a result, multiple versions of a document can be generated without changingthe source file.
The name or identifier of a mode can be any combination of letters, digits, or
spaces. Names starting with <code>*</code> are reserved for system modes.
= Setting modes =
{{cmd|disablemode}} deactivates a mode, and {{cmd|preventmode}} permanently
deactivates a mode. All three commands take a list of modes as an argument. For
example, you can activate to active modes named <code>screen</code> and <code>solution</code> withuse:
Modes can also be activated by a command line switch <code>--modes</code> to
<code>texexec</code> or <code>context</code>. For example, another way to activate the <code>screen</code> and
<code>solution</code> modes, to run ConTeXt using one of:
texexec --mode=screen,solution ...
context --mode=screen,solution ...
== Pre-defining modes ==
Normally, the overhead for testing modes is negligible, but it can add up if modes are tested multiple times in a document (for example, as part of a macro). In such casesTo speed up the processing, you a mode can be ''define'' a mode d before using them, to speed up the processing. Modes are defined usingbeingused:
4:3 aspect ratio and a width equal to the width of A4 paper.)
Alternatively, youcould set a default paper size for the screen and change it if screen mode isnot enabled:
% NOTE: Empty lines are not allowed here!
[mode1, mode2, ...] {Processed if either mode is enabled}
% NOTE: Empty lines are not allowed here!
[mode3, mode4, ...] {Processed if either mode is enabled}
[default] {Processed if none of the above modes match}
== Checking modes in Lua ==
In MkIV, the The state of any mode is accessible at the Lua end as <code>tex.modes</code> table. Specifically,
Other modes are useful for very specific situations. Some of these are described
<code>*first</code> mode is handy&mdash;it is active only on the first run of the
You may want to use different images for XML [Export]. The <code>*export</code> mode is useful in such cases.
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