Originally Posted by
SPN Lifer
When beginning a search, by clicking the magnifying glass, the initial search is as you describe.
From there, near the top right corner (above), one has to click on "Advanced >>" (in blue ink, as a link).
One can input the same terms. But if you scroll down to the bottom of that page, you will see an option to search specific forums, "Search in Forum(s)".
The default is "Search All Open Forums". But if you click on that line, you will be given a list of all open forums:
Again, "Search All Open Forums" is the default. From there, one has to uncheck that and pick one or more other particular forums for greater specificity.
If quoting this post, please do not copy all four pictures!

Thanks, SPN Lifer. This works, although it's a really cumbersome, nonintuitive way to search a single forum.
Originally Posted by
TWA884
The mobile skin has a different search interface than the desktop version. The desktop version has a "Search this Forum" link at the top right of the threads list. Individual threads have the same feature.
Thanks, TWA884. The screenshot you posted is what I'm accustomed to seeing, complete with the "Search this Forum" link. However, the screen I see now in my desktop browser is pasted below. The Search this Forum funciton isn't there. I must say I much prefer TWA884's screen layout over this one!