Maintaining previous idle state while loading a waveform

Hi,

Is it possible to generate waveform1, in idle state hold the last bits of waveform1 (using 'X' in the idle state function), then load waveform2 while still maintaining the idle state from waveform1, and then generate waveform2 having it start from the idle state of waveform1?  Or is the idle state lost when waveform2 is loaded and/or initiated?

Thanks!