PATH: Administration > Add-Ons > B1 Usability Package > Module configuration > Beas usability extension >
1. Click New Function button >
2. select "Type": Script.
With the help of the Script Universal Function you can enable the execution of scripts.
For field descriptions of Header See: Universal Function Definition
Window sys_function_edit.psr
Field descriptions highlighted:
Language: Select in which language the script is to be written. Currently, only beas script is available.
Script: Field used to add the script that will be executed once this function is used. To start writing the script, click on the 
icon, then click on the Create Script Assistant icon 
in the beas script Editor. See beas script assistant