TeX - LaTeX Asked on December 29, 2021
I am having a hard time trying to figure out the difference between leftmark
and rightmark
in fancyhdr
. At page 8 of the documentation, it says
The
leftmark
contains the Left argument of the Lastmarkboth
on the page, therightmark
contains the Right argument of the fiRstmarkboth
or the only argument of the fiRstmarkright
on the page.
However, I could not find the definition of markboth
. Could anyone please teach me of the difference or definition of leftmark
and rightmark
?
My though is, based on my use of fancyhdr
, leftmark
writes chapter number and name if chapters exist, if not, it will write section number and name instead. As for rightmark
, it will always write the title one level lower than that of leftmark
.
Thank you in advance!
The primitive mark
stores one piece of data.
The latex commands markright
and markboth
splits the argument of mark
to be able to store two things. So
markboth{left 1}{right 1}
does more or less mark{{left 1}{right 1}}
markright{right 2}
retrieves the left part of the previous mark and then
stores it together with the new right content. So it does (again more or less) mark{{left 1}{right 2}}
.
The stored contents can be retrieved (only in the header and footer, at other places the result is not reliable!) with leftmark
and rightmark
.
As the names indicates the commands retrieve the left and right part respectivly: leftmark
gets the left part of the last mark on the page, rightmark
the right part of the first mark on the page (or the last on the previous page).
With normal setups you get these marks
==== page break, new chapter:
chapter: {{chapter} { }}
section1: {{chapter} {section1}}
section2: {{chapter} {section2}}
==== page break: leftmark: chapter, rightmark: empty
section3: {{chapter} {section3}}
section4: {{chapter} {section4}}
==== page break: leftmark: chapter, rightmark: section3
Answered by Ulrike Fischer on December 29, 2021
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