In your profile you can predefine several settings that will later be used in each of your new recipes.
In existing recipes you can apply a profile as well. Simply select “Apply Profile” after selecting your profile in the recipes “General” tab.
When you don’t create a profile, the presets will be taken from a standard profile identical for all users.
If you created a profile, this one is used as your default profile. If you have more than one profile, the first one is used. You can control which one is the default profile by checking the “Default Profile” box of the respective profile.