Currently you can only pin a RFI to one drawing. More often than not, a RFI affects multiple locations. There should be an option to link it to multiple locations. Also, while pins make sense for issues/punchlist, they are not practical for RFIs. There should be an option to hyperlink RFIs to text/cloud markups. This would also alleviate the single pin issue. The only way I see to hyperlink RFIs (without a pin) is to export the RFI to pdf, and then store it in your project files folders. This seems to be adding unnecessary doc control.