Add option to show whole document

There should be an option to show the whole document at once in the overview instead of only showing a part of it. The reasons for my request are:

• Scrolling in large documents does not work well, as scrolling suddenly speeds up when getting too close to the top or bottom of the scoll area while dragging.
• If you know the content of the file, you can identify the different parts visually and jump there directly using the overview, this is currently not possible, as only a part of the document is shown.

A product that shows my requested behaviour is Visual Studio 2015, in case that you need a sample.