Technical Manual

You can view that the newly configured access rule sits just after the already configured one.
Create a Standard Access List
Complete these steps in order to create a standard access list with the ASDM GUI.
Choose Configuration > Firewall > Advanced > Standard ACL > Add, and click Add ACL.1.
Give a number in the range allowed for the standard access list, and click OK.2.
Right−click the access list, and choose Add ACE in order to add an access rule to this access list.3.
Select the Action, and specify the Source address. If required, specify the Description also. Click
OK in order to complete the configuration of the access rule.
4.