Heeling and railing are the same. Mono hull boats heel and windsurfers rail. I am not sure what term is used for cats. Heel I suspect.
The greater the speed as a result of more wind or a larger sail, the board will "rail" more easily and with any sailing craft that is railing or heeling to the extreme, more weight must be added to the windward rail/side to keep the board from turning over, thus the location of the "hiking or heeling" foot straps on the rail further up the side of the board.
Roger's description is what to do to rail the board in lighter winds and lower board speeds. By doing what he says, the board will rail and point higher into the wind.
Formula 160; iSonic 111; HiFly Move 105; Tiga 263; '85 Mistral Superlight.
Maui Sails TR 11.0; 9.2; 8.4; 7.6; 6.6; Maui Sails Switch 6.0; 5.2; Maui Sails Global 4.5; 4.0.