I suggest that the ALT+R default keypress is changed, as it clashes with the in-game function for disabling/enabling the players' personal roboport.
I have changed mine to ALT+S. To remember it, I think of (S)wapping the connectors. I THINK that ALT+S is an unused combination. I have many mods installed so it's hard to be 100% sure, but I've checked my keyboard settings and used GDIW Hotkey in-game, and everything seems to work fine.
There are so many things to do in Factorio that sometimes it can be hard to find an unused keyboard combination! :-)