PSE Power Fine allows you to adjust the residual power output of the ports so they can output more power as long as you have enough Total Power Budget (TB). This is used in some specific applications where you know your devices are riding right at the 25 watt limits of PoE+, say with a PTZ camera or a large Wifi access point (some of the high performance Cisco WAP's fall into this category if their USB ports are turned on).
Depending on your situation you can add 5%, 10%, and 15% to the Power Budget (PB).
Use the up and down arrow buttons to select the option preferred, then use the "Enter" button to select it. When the < is next to the setting and green, your option is selected. "Back" out to the main menu.