When you goto the Map workspace, current location in the scale of above right is shown(block level).
When you press Done, this is moved to be composited into the Panorama Workspace.
Gestures on Maps
Zooming in or out expands or contracts the area that is fit into the Map workspace. When you press done, the same map is obtained independently to be composited in the Panorama Workspace. The two may be very similar but it is possible or not exact(due to nature of numerical calculations involved).
PanningYou can zoom out(or not) and move to an entirely different region of the map by scrolling the map(one touch)
There is no limit at present on how many slices of maps can be combined. In future, we may impose these if it becomes necessary either due to software constraints or due to constraints imposed by others on us.