If you have the units selected, you should be able to just click a tile outside the city to move them out there.
Yes, that is possible. However, that makes the funtion to "eject" them (via the banner left to the unit portraits) very pointless. Well, I ll doing it the other way then. So, anyone else has issues with SHIFT when selecting multiple units in town? My mouse cursor's movement is stuttering when I hold shift. But only in that UI area. Its weird.