I just recognized that the Settings Highlight (Settings > Settings Highlight) doesn't include the option to highlight when the no-split is enabled in a game.

I was about to post a suggestion on Uservoice to add this, but saw that a player has already voiced this:

https://warlight.uservoice.com/forums/77051-warlight-features/suggestions/6741489-hightlight-no-split-mode

Just wanted to let you know. Maybe you'd like to vote for it, too.

Edited 5/19/2015 18:45:04