regarding button in pf status

hi i have created a button in a z pf status , which i am using in the output of alv.

my question is

1) is there anyway i can actually change the dimensions of the button , like making it bigger and in square shape or something.

2) if i want to see the button in the alv report , ( as opposed to seeing it in your application bar ) how do i do it , as in it should be seen at the end of the list or something.

will this require a lot of change in code.

i am using normal functional modules ( not Object oriented and do not want to change now.