Edit Town

Edit Town is a powerful game mode in The Sims 3, which allows the player to edit and customize the neighborhood in the active saved game file. Edit Town lets the player control many aspects of the neighborhood outside of the currently-active household, including lot assignment, and allows the player to enter Buy Mode and Build Mode on neighborhood lots, even on community lots. This mode largely takes the place of the Neighborhood menu available in The Sims and The Sims 2.

Getting into Edit Town
Player can enter the edit town by opening up the options menu in the bottom left corner of the screen.

Trivia

 * In the Edit Town mode, player can also create a new family and place a copy of it or of existing one from library to world. Later, player can switch from instantly playing family to control another one using Edit Town.
 * Player can enter in Edit Town of all neighborhoods and sub-neighborhods that exist in The Sims 3.
 * As of Patch 12, player can add, delete and move residential lots, comunity lots and neighborhood decorative objects from the Edit Town menu.