There are lots of things you can do but here a few suggestions:
Lean forward during the dip - emphasizes more chest
Stay very vertical during the dip - emphasizes more triceps
Do dips with your legs straight out in front of you (L dips) - hard on the abs and hip flexor (and may be tough depending on flexibility level)
Bench Dips - easier than regular dips, most of the emphasis is on the triceps
Of course weighted dips using a dip belt, weighted Vest, or holding a DB with your feet (hard to do)
Top 1/4 dips - just do the top 1/4 ROM, good for the tris, much easier than a normal dip
Dip Walks - do a dip, then walk your hands forward a bit (feet don’t touch the ground), do another dip, etc. May have to go forward and backward depending on how long your dip bars are.
Hopefully you will get some more creative suggestions but that should get you started.