Good day.
Is it possible to adjust the start and end of the timeline without moving any elements on the 3D viewport?
the scene start at 350f and ends in 660f. I want to make this start on 1f without adjusting anything in 3D viewport.
is it possible?
The key values already recorded are not resolved without moving the frame. 
It depends on the purpose of use, and you can also use the method of @Lumpengnom .
yes. but I also need to adjust all the timing of the effects and animation of the scene if I adjust it in there…
Ah. That is what the dope sheet is for.