Zoom all: Zoom to the entire extent of the map. The extent is calculated by the boundary box of the visible layers.

Zoom in: Zoom the map twice. The map can also be zoomed by pinch (two fingers) or mouse wheel.

Zoom out: Shrink the map twice. The map can also be zoomed by pinch (two fingers) or mouse wheel.

Pan: Pan the map. This is the default tool. The map can be dragged by finger or mouse.

Window: Draw a rectangle (usually from top-left to bottom-right) to zoom to its content.

Scale: Set the display scale number manually. Enter the scale number only without "1:".

TMS offset: This tool moves the active (top visible) TMS layer horizontally. It can reduce the inaccuracy of a TMS layer. A simple click with this tool reset the offset.