When I'm defining a parameter, like: PARAMETER pa_date TYPE d DEFAULT sy-datum. How do I change "pa_date" to something else when the app is launched? I want to change it to something like "choo...

I have screen filter at selection screen like this SELECTION-SCREEN BEGIN OF BLOCK a WITH FRAME. PARAMETERS s_werks like resb-werks DEFAULT 'X' . SELECT-OPTIONS: s_aufnr FOR in_param-aufnr, s_ma...

I'm trying to replace the parameter name shown on the selection screen. For example I have: PARAMETERS pa_age TYPE age_type DEFAULT '18'. It shows PA_AGE on the screen. How to change it to H...