auctex: Marking (Texinfo)
2.7.2 Texinfo Commands for Marking Environments and Sections
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-- Command: Texinfo-mark-section
('C-c *') Mark the current section, with inclusion of any
containing node.
The current section is detected as starting by any of the
structuring commands matched by the regular expression in the
variable 'outline-regexp' which in turn is a regular expression
matching any element of the variable 'texinfo-section-list'.
With a non-nil prefix argument, mark only the region from the
current section start to the next sectioning command. Thereby
subsections are not being marked. Otherwise, any included
subsections are also marked
Note that when the current section is starting immediately after a
node command, then the node command is also marked as part of the
section.
-- Command: Texinfo-mark-environment
('C-c .') Set mark to the end of the current environment and point
to the matching beginning.
If a prefix argument is given, mark the respective number of
enclosing environments. The command will not work properly if
there are unbalanced begin-end pairs in comments and verbatim
environments.
-- Command: Texinfo-mark-node
('M-C-h') Mark the current node. This is the node in which point
is located. It is starting at the previous occurrence of the
keyword '@node' and ending at next occurrence of the keywords
'@node' or '@bye'.