I'm trying to find the commands and syntax for the UCF file, but the information is either in plain view and I'm stupid, or it's well hidden somewhere and I can't find it. Of course, I can copy bits of other files, but it'd be nicer if I could understand what I am doing as I did it! I'm using EDK 9.1.
That makes sense. In that case you may want to have a quick way (bookmark, shortcut, soft-link, etc.) to access the "manuals.pdf" file as that is the main Xilinx ISE "Software Manuals" document and includes embedded links to the other documents.
You should find this under your xilinx installation path under /doc/usenglish/books (assuming Linux has a similar directory structure to Windows, which in my case is %XILINX%\doc\usenglish\books)