Hi,
I checked both 11.5 and 11.6 UCCX versions and looks like the maximum predefined response character size is 1500 and cannot be modified. As a workaround, I would suggest creating two predefined responses of 1500 characters each and assign it to the same CSQ. The assigned CSQ will get displayed under the "Tags" field as shows below :
![ccsf7.JPG ccsf7.JPG](https://community.cisco.com/t5/image/serverpage/image-id/5031i23EE6376EBBE10F7/image-size/large?v=v2&px=999)
Thanks and Regards,
Deepak Nair