From main menu. Tbh, I haven`t sailed back to port to reset yet. Still on first mission, so I could abort, wipe saved,and start again.

In some ways, it is very frustrating the way they did the Options for gameplay in SH4, but then again, it does allow some variety...

The Single Missions, Single Patrols and Multi-player scenarios all run off of the Main menu's "Options" menu choice. Easily accessible each time you start, so long as you remember to do it...

The Career choices are available once in the Captain's Office, either before you start a patrol, or between patrols, by clicking on the radio console:
https://i.imgur.com/R92jLWT.jpg

This at first seems silly, but you can't have the options changing on a Save game file if you think about it, which would happen if they were only on the Main Menu. Also, you can have an 'easy' career, a 'normal' career, and a 'realistic' career all going at the same time under different skipper's names, and each can have their own gameplay settings different from the others. That is kind of nice. Again though, it comes down to remembering to do that for each career start. Once set though for each individual career you make, they stay set that way, until the next time in the Captain's Office, where you can change them again, if desired. :salute: