With the multiple windows in Casedo (there are two at the moment, but in future, there will be more), the coloured tramlines provided total control over what you see in each Document View.

 

Just select the ‘tram stop’ in the relevant colour, next to the document, and it will open in the relevant window.

 

 

If you only have a single window open, you can open the second window by clicking the icon in the bottom right of the open windowpane.