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[fwc]: /help?cmd=wiki
[fwt]: ./wikitheory.wiki
### <a id="ln"></a>Line Numbering
When viewing source files, Fossil offers to show line numbers in some
cases. Toggling them on and off is currently handled in JavaScript.
([Example][mainc].)
cases. ([Example][mainc].) Toggling them on and off is currently handled
in JavaScript, rather than forcing a page-reload via a button click.
_Workaround:_ Edit the URL to give the “`ln`” query parameter per [the
`/file` docs](/help?cmd=/file), or provide a patch to reload the page
with this parameter included/excluded to implement the toggle via a
server round-trip.
`/file` docs](/help?cmd=/file). Alternately, someone sufficiently
interested could [provide a patch][cg] to add a `<noscript>` wrapped
HTML button that would reload the page with this parameter
included/excluded to implement the toggle via a server round-trip.
As of Fossil 2.12, there is also a JavaScript-based interactive method
for selecting a range of lines by clicking the line numbers when they’re
visible, then copying the resulting URL to share your selection with
others.
_Workaround:_ These interactive features absolutely require JavaScript.
The alternative is to manually edit the URL, per above.
[mainc]: https://fossil-scm.org/fossil/artifact?ln&name=87d67e745
### <a id="sxsdiff"></a>Side-by-Side Diff Mode
The default “diff” view is a side-by-side mode. If either of the boxes
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