I noticed some symbols in the Oz Vehadar Rif that look exactly like the symbols in the Gemara that direct you to the Gilyon Hashas (the "do not enter" symbols). I can't figure out what they refer to. Everything on the page is either "Rashi", the Ran, the Baal Hamaor/Milchamos, or lettered notes. The yalkut mefarshim al harif doesn't seem to have notes corresponding to these symbols.
Maybe I'm missing something obvious, but where those symbols directing me?