If you're using the Geltech skin, click the tick/cross icon in the top left of the post. If you're using the Chromo skin, click the scales icon underneath the poster's details on the left.
Better still, looks in the Suggestions Forum and read all the other threads made by people like yourself who want to know how to add rep. It's been answered many times.
A forum community dedicated to all Wrestling enthusiasts. Come join the discussion about WWE, AEW, Ring of Honor, Impact and all forms of professional and amateur wrestling.