Compressed V Grip
Start with standard V Grip and then pinch the thumb and rear part of the forefinger tightly together on the top of the handle. This movement simply brings the position of the thumb and lower bone of the forefinger closer to the top centerline of the handle., making the grip just a bit more secure. However, unlike the standard V Grip, which is a very relaxing way to hold the rod, the Compressed V requires that the angler exert a bit of muscle tension to keep the thumb and forefinger tightly together. The slight bit of muscle contraction can make the hand rather tired after a few hours of fishing.
Casters of all styles can use this grip, but apply the usual caution of not bending the wrist too far rearward on the backstroke.