Ultima VII introduced major changes in the Ultima series. The most serious alteration is that as far as the player is concerned, the world is no longer tile and grid-based; tiles are still used internally (in a largely improved way where the tiles themselves are smaller and frequently grouped), but they no longer affect character and monster movement or the item placement the same way.[4] The maps are also more visibly multi-layered, and objects and things can be stacked on top of each other. This can also affect movement, and be part of puzzles; some places are inaccessible unless the player stacks items to form stairs. A striking visual change is that the gameworld now takes up the entire screen in its original DOS environment, while previous Ultimas used a substantial portion of the screen for text, dialogue, buttons, icons, and the like.
The game is the first in the series that is entirely mouse-driven, with optional keyboard hotkeys for some common actions. This is in contrast to earlier parts that were entirely keyboard-driven, and to Ultima VI which supplemented keyboard commands with on-screen command icons.[4] While in Ultima VI, the player has to specifically use a "move" command to move an item from place to place, or "drop" to drop it on the ground, in Ultima VII, items are simply dragged and dropped in their desired locations. While the game could be played entirely with a keyboard, doing so is very difficult, and in-game characters would recommend the player use a mouse.