On 5/16/26 4:09 PM, Ehud via lyx-users wrote:
I have a multi document LyX project:
File main.lyx, with ch1.lyx, ch2.lyx as child documents of main.lyx .
I use a couple of `math macro` in all of them to save time in typing.
How can I define those macros one time (preferably in the main file) and tell
LyX that all child documents should be aware of those macros?
Macros defined in the main document will be visible in the children. If
you open the children directly, however, then the main document may not
be opened: The children are treated as 'standalone' documents, and the
macros aren't visible.
To fix this, go to Document> Settings> Document Class, and look in the
middle. There is a field that says "Select default master document".
Check the box and choose the master document. Then, whenever you open
the child, it will be opened as a child of that master, and your macros
will be visible.
Even better, you can put your favorite macros into a special document:
MyMacros.lyx. Then include that document as a child of any document in
which you want to use those macros. If it is a document set, as
described above, just make it the first child, so the macros will be
visible in all the children. The only downside to this strategy is that
you may end up with a lot of macros being declared in the LaTeX file
that you don't actually use. But that's rarely a problem, and if you
need to submit the LaTeX file to a journal, say, you can manually remove
the ones you don't need.
Riki
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