I just started playing FE:LH (just passed the ten hour mark) but I am suddenly having difficulty with the way the game is displaying. When I open up/start a game, the normal playing view is a nice isometric projection of the world. I like this. When I shift to town view, the display changes to a top-down "map" view, which works fine for the purpose of planning towns, and normally when I exit the town mode the view shifts back to isometric view. However, I am increasingly finding that the game shifts to the top-down view and I cannot return to isometric view. I can restore the isometric view only by saving the game and reopening it from the main menu, but I am finding that it switches back to top-down and stays there on an increasing basis?

Is there a key shortcut to revert to isometric view? I looked in the manual but do not see anything.