How to use saved code?

Workshop
1

My favourite custom game mode is not always exist in a list of all modes (at least with a general name). I have the code saved but I don’t know how to create the game with it. Can someone explain me pls how to do it as it is very unintuitive for me?

2
  1. Create a new lobby
  2. Click on settings
  3. Click on presets
  4. Click on your saved preset at the top
  5. Click OK