Initial value-Initial guess at a time dependent solver

Hi all,

I was wondering whether Comsol is using an initial guess for every time step at the time dependent problems.
I know that it needs an initial value (at time=0) to start solving the problem.
My understanding is, that an initial value is required for the stationary solvers(I suppose this is just an initial guess, that will later on be overwritten). Is there such an initial guess for every time step at the time dependent problems?

Any thoughts?
Thanks a lot!

Nancy