I have a song with two strophes. Is it possible to mark one of these strophes and duplicate it exactly within the song? How can I do an exact marking of a strophe with the exact beginning and ending? Is it possible to change the marking for example of the beginning of the strophe in small amounts (milliseconds or something like that).
 
Thanks for your advice.

Is it audio or MIDI.
 
Is the form on a single track or is it spread across multiple tracks?
 
Either way the answer is yes.

This may seem too obvious, but, copy and paste?
 
You can use markers to locate start and end points.
 
Steve

It is an audo track.
"You can use markers to locate start and end points."
Could you explain that in detail?
How can I set the markers and how can I correct them, if they are not exact in the right place.
"Copy and paste" is not a bad thing. But if I copy the one part, how can I place the copy without deleting the original part (I want to duplicate the strophe).

Select your data, copy it.
Position the Now Time where you want it pasted.
Paste it.
There is a nudge function which, you can use to nudge it where you want if it's not in the right place.
 
It's not my intention to sound condescending, but this is pretty basic stuff and you'd learn an awful lot by doing the tutorials & reading the manual.