Trump has proposed eliminating many of the major existing categories of legal immigration in the core, family-owned action based system. He's proposed replacing the eliminated categories with a small number of renewable non-immigrant (no path to citizenship or work permission) visas for parents of US citizens.
He's proposed no concrete increase in total permanent allocation in the remaining categories, though he's talked about cancelling the diversity visa lottery and reallocating the quota used there to help clear backlogs elsewhere.