Hi Lee,
Do you want to remove the CHANGE button for all users? If so, open application in admin mode and set visibility property of button
Refer this:
You can also use application configuration
Refer the below document:
Customize view fields using application configuration in Webdynpro ABAP
Enhancement of WD:
You can enhance the standard component and in post-exit of wddomodifyview( ) method you can get the button and set visible property based on your requirement.
Hope this helps you.
Regards,
Rama