When you say to designer “Can I make just one more change? I promise it’s the last one.”
I know and also you know that there will probably be other changes after this one. However, you’ve asked for multiple tweaks already. When you apologetically say something like: “I’m so sorry to keep taking up your time like this, but I found another change I’d like to make. Can you change this, and this time is last change word or font or graphic or color etc?
But this time I will add the extra time for these edits to your invoice. So next time, try compiling a list of all the changes you’d like to make and hand them over to the designer to do all at once, which is more efficient for everyone.