I would like to changing a title of a button in a form, and I would like to have a tool for debug, like devel or another, so I can see in real time, after a page is loaded, what is the structure in forms, subcomponents, name of every field.
So I know how could add a line to the code in my custom module to change the title of a form button.
How would you do it? Steps, method, tools, please share.
Note: These are my first steps in programming modules, changing simple things for now.
Thanks for your suggestions!