boundary condition types i can't find in examples/docs

is there a resource explaining how to have other types of Navier-Stokes boundary conditions? like:-

  • fixed pressure boundary.
  • no perpendicular flow. (symmetry)
  • infinite (no returning information cf perfectly matching) not sure what this might be called.

all the examples i see are for velocity, i made a guess as to how to do some of these, but no good.

stuck, can you help again?