Add custom field to dialog popup when click on Propose to major incident button

[Deėpak Sharma]

When a user click on Proposed to Major Incident from form Context menu, then this dialog pop-up and it has two fields, my requirement is to add one more mandatory custom field here. 
Field Name :- Managers Group

Type: Reference(sys_user_group)

Help me in this... Please share whole steps end to end ... 

[Ankur Bawiskar]

@Deėpak Sharma 

I already informed that I may not be able to share complete script.

Please enhance the UI page as per your requirement.

[Ankur Bawiskar]

@Deėpak Sharma 

Thank you for marking my response as helpful.

If my response helped please mark it correct and close the thread so that it benefits future readers.

[Deėpak Sharma]

any update ankur sir??