You can browse all lines that have not been visited, or those that have.
Query menu
choose Find unvisited lines...
displays the Unvisited Lines dialog
The dialog displays a hierarchical view of the files, functions and lines.

In this colour scheme all lines will be shown in pink since they are all unvisited.
As with the other query dialogs, you can expand the search results, and double click the data items to edit source code in your preferred editor.
•Refresh
updates the list
•Visited Lines
displays lines that have been visited
All lines would then be shown in green or whatever colour you set.
•Unvisited Lines
lines that have not been visited