Voters may choose to rank all the available candidates (using numbers rather than a cross) or only as many as they wish, which may be as few as just one.
Gall pleidleiswyr ddewis rhoi’r holl ymgeiswyr sydd ar gael mewn trefn (gan ddefnyddio rhifau yn hytrach na chroes) neu ddim ond cynifer ohonynt ag y dymunant, a all fod cyn lleied â dim ond un.