Schedule Board Customization to add button

Hello everyone,

We do have requirement to add a Custom button to Schedule board screen/grid as highlighted in below Screen print. It should be withing Action Menu or outside or anywhere but on same screen so from different views/Tabs user can click on it. 

We do need to open a window to display some data related to particular Schedule board tab. It must be delivered either supported or unsupported way so, all solutions are welcomed. all I need is a way to add button on schedule board and be able to write some JavaScript code to open a window.

Thanks in advanced.

Regards,

Harshil Shah