Request W-2 Re-issue ESS

Hello,

I am new to webdynpro and FPM. I have an object to change the input box which displays on the ESS screen when EE click on the W-2 Re-issue.

Currently, I can see one push button with text "send" on it. Below that year and drop dawn list to select the year. I am wondering where I can see all these configured screen elements and change as per the requirement.

Thanks in advance!!