Self serve and adding gratuity

[WilliamCutting]

Is this an option that I don’t see? The staff survives on tipping and there seems to be zero option to do this. 

[AdamB]

Thanks for your question, @WilliamCutting.

To do that, you'll need to go to Settings > Pickup & delivery and enable Order tipping in the Advanced settings. It looks like you've done this but I'm not sure if you did it before or after posting here.