From the app drawer, select Setup > Map > Advanced Setup > Zoom Controls.

Auto Zoom

Automatically selects the zoom level for optimal use of your map. When disabled, you must zoom in or out manually.

Portrait Buttons

Sets the location of the zoom buttons when in portrait mode.

Landscape Buttons

Sets the location of the zoom buttons when in landscape mode.

Zoom Levels

Adjusts the zoom level at which map items appear. The map items do not appear when the map zoom level is higher than the selected level.