This view allows you to change the general document or the view.
Here are all globally properties that you can set like name and description. Additionally you can capture a thumbnail from the current viewport to see it in the home page.
Here are all page specific properties. Currently you can find the background setting here.
The grid allows you to exactly position elements. You can use it to move elements or create shapes.
The ruler allows you to measure the distance between two points. Additionally you can use it to create a line with the pen tool.
To jump to a specific position or zoom to a specific level you can use this tab.