Adding custom type to event calendar


I have a requirement to add a popup control in my event calendar editor
but there is no such type available
how can I create a custom type for popup and add new control to editor?


Unfortunately, currently there is no built-in option to set a custom type control.
Do you have any kind of sketch or mockup of the control you need to add?
I can pass it on to the dev team. No promises that such control will be implemented, but having these details will help us to decide on new features