Returning Noob Needs Help

all. I'm not sure if it's just my failing memory or what but I seem to recall being able to access the recognition manual while at the attack periscope but can't seem to remember how to do so. I'm using the TWoS mod without the realistic navigation and with smoke trail on. I'm trying to practice using the TDC with the historical mission TDC tutorial. I'm looking around the UI and can't see anything that allows me to access it. Didn't see anything in the manual. Was it a mod that I used in the past that let me do that? Did the TWoS mod remove it? Am I just blind and dumb and can't see what's in front of my face? Any help would be greatly appreciated. Thanks.