Would be nice to have an extra Grat button! one is not enough!
Just make the button open like Aloha and micros does ... open AMOUNT or open %

Absolutely:making that screen customaizable is essential to a business like a beauty salon. The merchant should have the possibility to show dollar amounts instead of percentages: it eliminates the unethical overtipping problem that happens when a clients taps on a % not realizing that this % will apply to the whole products+service transaction, not just the services. I do not want my clients to feel taken advantage of: if they see a dollar amount, it makes the tip more concrete and less susceptible of buyer's remorse.

dollar amounts and percentage tip suggestions. ability to remove no tip option and require customer to select custom amount and put $0 if they dont want to tip

Merchants that move over from Square are used to their tips button being able to suggest whole dollar amounts rather than percentages. I have had dozens of merchants ask for that feature and have had 5 merchants move back to square specifically because of it

What are some of the customization option your looking for .on the tip suggestions .