Similar to mablak's thread, this is a tool that gives a player an advantage and doesn't create an even playing field, even tho its a advantage which is small its still a tool to aid your menory, like marking. It's on screen marking the cr8, anyone that forgets the cr8 could easly waste turn time roping to find it, this reduces the occurance of this potential error and therefore an advantage imo.
Shouldnt be allowed.