Restrict the field selection
i would like to restrict the field selection upto 20 from left to right pane in the field choice popup.
when the user cliks on the push button in selction screen, pop up will come for field selection for sorting order. now user will have a facility to move the fields from left box to right box, where we have to restrict only 20. if it exceeds, need to pass a message.
Could some one help on this.