For temp output this is not user editable at this time. However as described in the change log you can use several new variables in your *regular* file output names and you can control how/where they're used (in the Sequence/Output tab).
${BUILDNUMBER} // e.g. 4.4.09.1
${CAMERA} // the name of the camera at the moment the frame started rendering
${IMAGETYPE} or IMAGETYPE // e.g. tgSurfDirect, tgCloudRgb etc. If used for the main output it will insert tgBeauty
${LAYER} or ${RENDERLAYER} // the name of the render layer at the moment the frame started rendering, if one was connected
${RENDER} or ${RENDERER} or ${RENDERNODE} // the name of the render node at the moment the frame started rendering
${RENDERSECONDS} // render time in seconds, e.g. 134
${RENDERTIME} // render time formatted with hours, minutes and seconds (e.g. 1h07m24s), or without the hours if shorter than 1 hour, e.g. 02m14s
${TGDNAME} // the name of the last saved or loaded TGD file at the moment the frame started rendering (or "Untitled"), without the path and without the extension
If you want to always have your custom file naming setup, just use "Render All to Disk" instead of the regular Render button.
- Oshyan