I just spent a few minutes staring at the help file trying to figure out what i had in mind.
I think the idea was that normally you set the template pattern for your filename which might include the quickfield, like "%quickfield% Screenshot - %datetime%"
This says that when saving a new file, if you type "test" into the quickfield, the file will be named "test Screenshot - 5/9/11"
BUT if you are strange you could do it the other way, and put something generic in the default new filename template like "Screenshot - %datetime%" and then in your quickfield customize this by saying something like "test %t%" which gives you filename of "test Screenshot - 5/9/11" or "%t% test" which would give you filename "Screenshot - 5/9/11 test".
So you put %t% in your quickfield to replace the default new file name template into your quickfield at a specific location and then save the file.
BUT having said that, it's clear the best advice is to ignore this feature completely, as it's strange and has no obvious use.
