I'm not sure whether this terminology is transferable, but this concept might help some here.
Say you have a lofi vocal line that you want to add an echo to, such as
I love you, the repeats will be 1. I love you 2. I love you etc.
But say you want I love you, and the repeats to be 1. Love you 2. You 3. You
You can use double freezing to obtain this. (I usually take a copy of the track before this, just in case I don't dig it)
First apply the over all plugins you want minus without the echo (maybe comp + lofi). Then freeze it (that's the terminology in Samplitude) it embeds the plugins into the audio waveform in the DAW, this removes the plugins from the track as the fx have been embedded.
Then add the echo plugin on the track, and freeze it again, this again embeds the echo plugin into the track, now the echoes will appear in the waveform, so now the waveform can be chopped/copy and pasted to repeat only part of the phrase.
In Samplitude the pan position of each part of the echo can be individually set, so the echoes could be swung L or R.
Feel free to ask if you want any more info.
Hope this helps...