If you want to change the default prompted format to other format, you could do the following setting:
1. Setting for all users
Use reprot RSPRIPARADMIN. Input the report name and format, then the report will be printed
by this format by default. This setting is valid for all users.
2. Setting for individual user
In the print popup screen, click the "Properties" button.
In the "Spool Request Attributes" screen, click the "Format" and change the
format to the one you want to use. Click "Specifications" button.
In the next "Maintain Settings" screen, check "Valid for this report only",
click "Copy settings" and save the setting.
Next time, when this user print this report, the default format will be prompted automatically.
This setting is only valid for the current user.