Dunno if you mean in chat specifically, or elsewhere.
Elsewhere, there are several hotkeys for PC users. For example, if you have a factory open and ready to produce, pressing 1 will set a 3-hour production, 2 will set a 9-hr production, etc. Same in the military buildings; you can use 1-5 to quickly add troops to the queue. There are others that I don't rely on often so can't remember quickly. There's a list somewhere - the wiki? elvengems? I'm sure someone else will recall this better than I do.