If you've lost it, just reinstall the Level Editor package from the Login menu. If you're too lazy to do that, find it attached to this post.
However, it is really of no use to anyone wishing to reference it online because you should be using GS2 online, whereas commands.rtf only lists GS1 for use offline. That said, only reference commands.rtf if you are making personal levels you do not intend on uploading to Graal.
commands.zip
It is in a ZIP folder because the forums don't allow the uploading of the RTF file format apparently, but I cannot stress that you should make sure you read the above before just getting it and ignoring what I said.
Secondly: NEVER talk about Graal Reborn on here. It is an illegal discussion topic as it's not supported by GraalOnline at all.