are you talking about working on a map in your game or in a 3rd party software. If it is 3rd party software, we can not help you with that as that is not the function of the forums here. You will have to go to the forum for that software. If you were working on a map in your game, you just enter the game and resume where you were with what you were working on. There is nothing else needed to do. This is under the assumption it is a game you created and not a player in someone else's game. If you are working in someone else's game and you are not seeing your map, you will need to contact the Co-GM or the creator of the game and have them move your avatar or the player's ribbon to that map page.