What do enhanced tallies do?

In EHX, on Cards and Ports on the panel options tab, you can select ‘Enhanced Tallies’ if your panel is a rotary panel - but what does it do?

If we use the IFB as an example, when enhanced tallies is selected - the talk part of the tally turns purple on the panel when pressed or the key is active.

If you deselect ‘Enhanced Tallies’ the talk part of the tally returns to the standard red as opposed to the enhanced purple colour indication.