The Hunters - mark months for repair and refit

Hello, I’ve been playing the module for the The Hunters, based on the Consim Press submarine game. The module works great, but I wondered if there is a way to mark the calendar months on the main screen as being consumed for refit or repair…? I can keep notes indicating it, but having the visual queue would be handy so it’s easier to keep our place when resuming a saved game. Thanks! Rob