This function is only available from a Pro account.
Click on the "Roles" tab under the menu item "Settings". Here you can now create and define up to 5 different roles.
There are some presettings available which you can apply by clicking on the corresponding button. You can also select or deactivate any functions.
However, you cannot select some functions (highlighted in orange), as they are important and serve the overall functionality.
Once you have made the settings, click on "Save".