For rebonding perm/s curve rebonding, twist it forward for tighter bouncy curls. And twist it backwards for looser and sexier curls. In addition, you might want to create smaller sections (4 sections) if you want the curls to be tighter. And go for bigger sections (2 sections) if you want the curls to appear looser. For the same perm, you can create different looking curls with different way of blow drying.
For C curve rebonding, use the second and third finger to bend the hair ends inwards. Ensure that your palm is facing the chest. If you want the c curve to appear stronger, you can use your thumb and the rest of the 4 fingers to bend the hair ends inwards.
For styling perm and J curve Rebonding, push the hair lengths forward and blow dry it similar to a c curve.