Originally posted by Moeniir
Ever get in the middle of a negotiation and then want to check something? Need to check with an advisor? Want to see what another civ is asking for the same tech? Can't remember the name of the city you want to demand?
If you are in the deal-building screen (lists of everything you have to trade), you can press enter to leave the negotiation - no goodbyes, you just leave. When you re-enter diplomacy with the same civ (during the same turn), you are brought right back to the deal screen... with the same deal-in-progress still on the table. This also works if another civ approaches you on their turn... hit enter. Play resumes, and during your turn, you can go back to them and pick up where you left off (perhaps after checking with some other civs or an advisor).