I'm trying to make a new calligraphic brush in Illustrator when I noticed alot of the options are disabled can anyone tell me why this is disabled and if it's possible for me to enable them?
The brush dynamic options are only available if you have a drawing tablet connected to the system.
In some instances, even some drawing tablets may not make the options available. Adobe only really tests applications for Wacom tablets. They may do some cursory examination with tablets from other manufactures, but they primarily focus bug-squashing on Wacom tablets.