The program allows you to record additional data about your loads, yet it keeps this data out of your way when you're working with trajectories. Click the Data button to open the Extended Data window.
None of the values in the Extended Data window have any affect on trajectory calculations. Thus, you can enter just the items you want to track (if any) and leave the rest blank. However, Gun Weight and Powder Wgt. must be entered if you want the program to calculate Free Recoil.
The Note Pad allows you to enter up to 255 characters. The Extended Data is loaded and saved with the rest of the trace parameters. Tabs at the bottom of the window allow you to select the other traces.