Try this… seems to work for me anyway…
With the mission brief screen up… press the “Prt Scn” button on the keyboard. This action saves a copy of the screen image to your computer’s clipboard.
Alt/Tab out of the SIM… and open the image viewing/editing program of your choice. I use Paint Shop Pro.
Select Edit and “Paste as new image” This should open the image you had saved to the clipboard.
Then resize if necessary in print options
If you press Prt Scn in BMS, it will automatically save a picture in Falcon BMS 4.32\User\Pictures.