I am taking some existing sketches from one of our clients and turning them into models.  They are somewhat detailed and I am adding many dimensions to define the sketch, so that my blue sketch turns black.  However my sketches are getting very cluttered.  Later we are going to come back and make some modifications and it is going to be confusing.  Is there a better way for me to define the sketch?  Am I able to hide these dimensions easily?  I will appeciate any tips or answers.  Thank you