Setting offset for .dtm file

[finap13]

During my TAS of Wario World, I clicked the "Start Recording" button around 300 frames after the game started. Because of this, all the inputs are offset, meaning the TAS does not work at all (because its using input that's 300 frames ahead). Is it possible to add an offset to the .dtm file? Or to the "play recording setting"?

Sorry for nooblet question, I'm rather new to this TAS environment.