Balance (Helm Phase)
You can balance the shields, redirecting power from one quadrant to protect another. With a successful Computers check (DC = 10 + 1-1/2 × your starship’s tier), you can shift Shield Points (SP) from the shield in one quadrant to the shield in another quadrant, including to depleted shields (after rebalancing, every shield must have at least 10% of the total current SP). Alternatively, you can add up the SP from all the remaining shields and evenly distribute them to all four quadrants, putting any excess SP in the forward quadrant.
Source
Core Rulebook pg. 324