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Brad, I don't think you've realized what F3 is for.
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Actually, I hadn't paid attention to F3 in the Quartus text editor. I rarely (and so don't always think to) use F3 in other applications because the method I'm in the habit of using works in most of the applications I use. I guess I'll have to form a new habit just for the text editor.
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Is there a reliable shortcut to search in messages? Sometimes I have to search for a specific warning...
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It might not seem as convenient for you, but I search the messages in a file. I usually just use the appropriate .rpt file that already exists, but an alternative is "Save Messages" on the right-click menu of the Messages window. This might seem cumbersome to look for just one message, but for me it's a good way to do something like search for every mention of a particular name in the design.