ajs18s said..
And what is this "EDGE" you all talk about? Is it when you dig the side or edge of the board into the water? I felt that I could lean onto my heals whilst traveling along the cable, but was unsure how far I could lean or put pressure onto my heals. I could not find this edge you all talk about. The board still felt slippery.
Short answer is yes, dig the edge of the board into the water.
Long answer:
Try turning your board completely on its side (1 long edge facing directly up, 1 long edge directly down) and submerging 1/3 the board into the water (up to the footpads). You should be able to glide the board quite easily forwards & backwards (running along the sunken edge), but be very difficult to move the board sideways (pushing the board through the water in front of you). You have effectively made the board into a big, long fin that likes moving only along the direction it is pointing. You can test this by trying to push the board 1/2 towards the front and 1/2 towards the side; the board will want to go only toward the front.
When riding you will likely never have the board standing vertical in the water, but the more vertical it is, the more the board will act like a big fin, limiting the movement sideways and making movement in the direction of travel more and more easy to maintain.
If you are practicing at a cable park (or on water starts) try to imagine the edge of the board as a big knife that you are slicing into the water, rather than a flat board bouncing on top of the water. To get this right, lean back against the pull so you can really dig the edge in more vertically and push hard on your heels to push the board deep into the water as you start to turn. This is especially true for your back heel as you want the bottom edge of the back of the board to be the deepest part of the slice as this part has the greatest fin-like effect. Since digging in the nose of the board can lead to bad wipeouts, it's also preferable to not use the front of the board much, so keeping the nose completely out of the water and only using the back part of the edge is fine (as seen in the pic above, 1/2 the edge in the water, back part of the board digging in deep).
Hope this helps.