How can i alter x-axis time range of scope output without changing waveform position? I want to do Discrete wavelet transform for that signal.

my model simulation time is 0.25 seconds same appear in scope x-axis(time)i.e from 0 to 0.25 .But i want to change this time from 0 to 3*10^5 seconds. When i tried to change scope parameters time range from auto to 3*10^5 waveform disappear and shifted fully to left side.i want that my waveform remain in same position and i can vary time range on x-axis without disturbing y-axis range. Is it possible sir?