Adding new shipping companies (fedex / dhl etc)

Hiya.. How do I add / change shipping companies? Can't see it under "Shipping".

This isn't urgent since it's my "play" site but it still attracts some revenue - and I always use a shipping company called MyHermes. Thanks.

(I'm running an older version of MP [2.8.9] because last time I did an upgrade to 3x, it all failed. Need to spend some time working out what the upgrade path is - but that's for another day).

Cheers folks. Callum.