Hi Manuel,
I think there is a translation error from German to English in this note, so pushbutton list is the one to one translation from German, but you have to modify the Application Toolbar.
Remark: If you can't change the next free items (should be item 8 and item 9) directly, then you have to proceed with menu Edit and submenu Modification Operations. There must be an option to do this.
Regards,
Klaus