how can i automatically generate the dimensional constrains while create the sketch?
how will generate the dimensional constrains like length,angle,diameter automatically while i am creating the sketch.... and how can i reduce the size of arrow mark
I don't think so there is an option for Generate dimensional constrains automatically while creating sketch.
We can create dimension automatically after create the sketches by AUTO CONSTRAIN option.
Answer for your Second Question is.
Go to TOOLS -> OPTIONS -> PARAMETER & MEASURE -> CONSTRAINTS & DIMESIONS
Here you can change the colors of the dimension line,size and all.
Hope my answer will help you.