Select which steps in a Transaction count towards total run time

When running a Transaction (i.e. a series of API calls and checks), the time each step takes is counted towards to total run time. But in some cases, you want to ignore certain steps. So if you could include a checkbox so you can uncheck a step, this makes time measurement more useful.
Use case: I want to call an API endpoint and measure the time that call takes. But before I can call that endpoint, I have to request a token from Microsoft first. I want to ignore the time it takes to get the token.