Show what it the currect engine mode on "NCrunch Test" screen or maybe via some icon in the VS status bar.
I often switch between modes like this:
Run all tests automatically -> Run all tests manually or Run pinned test automatically -> Run all tests automatically
This is due to make sure NCrunch does not get into the way by running tests that at the moment are doing more harm than good.
This can be done with custom configuration.
Since v3, it's possible to override many of the UI setting of NCrunch inside the engine modes. A tidy way to know which engine mode is selected is by customising your engine modes so that they each override the 'Marker style' configuration setting. In this way, you can have a differently shaped marker for each engine mode.