The ASDM is the most common method for administering the ASA after the initial device provisioning. Everything that can be done using the CLI can be achieved with the ASDM.
Let's take a look at modifying the existing configurations using the ASDM: on the ASDM, click Wizards | Startup Wizard.
The following window will appear. Two options will be available, whether to reset all configurations back to factory default or modify the existing configuration. We're going to select the latter and click Next:
The following window allows us to modify the hostname, domain name, ...