Can we customize the default system fields in jira?

[Reeta Kumari]

I want to include a new check box just shown in the image.

How can i achieve that?

Can we override issuepicker.jsp file with our own code?

if yes? how to achieve that? 

[Sanjog Sigdel]

@Reeta Kumari Welcome to the community.

You can update the default value and contexts of a default variable. But you cannot modify them.

[Reeta Kumari]

So can you elaborate.. Like how can I add default value to issue picker/Linked rapids?
Just refer the link below :

https://community.atlassian.com/t5/Jira-Service-Management/Need-to-populate-the-filtered-data-as-default-value/qaq-p/2501067

is this achievable??? If yes how?

[Sanjog Sigdel]

We can set the default value from Custom Fields -> Edit default Value screen. From an automation we get is updated value.

[Reeta Kumari]

Yeah this is for the custom field.. I get that. But the thing I want to implement it for is a part of System field and I want to customize system field. 

Just like on the below image while creating a new issue type I want it to link it to some other issues. So on click of that plus icon placed in front o RAPID field I want it to show default values in the issue picker by default.