Thank you for posting. As zoner has already mentioned, it is currently not possible to change the active thought indicator, only disable it. This would be a great addition Uservoice page (http://thebrain.uservoice.com) as that is the best place to submit your feature requests. Our development team reviews this site very often to obtain ideas for future features to implement. Uservoice lets them categorize users feature request by popularity. If your feature requests receive enough votes they can be a potential candidate for implementation in a future release of PersonalBrain.