If you are right-handed and a sign is made with just one hand, use your right hand, as that is your dominant or preferred hand .

If you are left-handed and a sign is made with just one hand, use your left hand, as that is your dominant or preferred hand.

Return to the drop down menu under SIGN GROUPS.  Scroll down and then over to the signs grouped together, based on similar movement, that use the dominant hand. There is a video for each group as well as a word description.