Render Settings Question
In Render Settings > General > Series Path, there's a little dropdown you can change between picture and folder. What does it mean? I've always left it set to picture by default...

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Comments
The picture icon lets you select a Render Library location that you have defined. That way you don't have to hunt down a specific folder to save the renders to. The folder icon, as you may have guessed by now, is to select any other folder in your system.
Interesting. Thanks for the answer!
You're welcome. Took me a minute to find it, though. That box changes title depending on render type: "Image Name" for Still Images (Current Frame), "Series Path" for Image Series or "Movie Path" for Movie. I also find that the Render Library - Folder selector is a little flaky. It tends to jump back to Folder selection while trying to select a Render Library. It's the same control as on the Render window, if you render to a new window instead of direct to file (for stills only).