Prompts issue and Formula variables.

Hi,

1. I have a variable in Bex report as Creation date, but when it comes to webi the default prompts comes as creation date(From) and Creation Date(To). Is there anyway to modify or delete these default prompts.

2. In one Bex report , i have a formula variable purchase order, based on this only the report output(as a condition) is displayed.I think that the conditions are not transferred from bex to webi, because the webi output is standard for all values of the purchase order. Is there any way to delete the default purchase order prompt