Babar Azam anchored Pakistan's second-innings response with a composed knock that steadied the innings after an early wobble against West Indies' new-ball attack.
West Indies captain Jason Holder rotated his seam options aggressively, using short spells to probe outside edges while the field stayed aggressive in the ring.
Pakistan's middle order focused on building a platform for a final-day push, with coaches signalling that strike rotation and patience would be key on a wearing surface.
With the series hanging in the balance, both sides know the next session could define momentum before the next fixtures in the international window.
