You can safe your commonly use addresses to your Snowflake Safe Address Book.
From the Safe left menu, click on the "Address Book" to open the Address Book page. From this page, you can add a new contact, edit or remove existing contact. You can also export all addresses to a CSF file.
All contacts are only stored in your local browser, so you can give them any name and they will not be accessible to anyone else.
Once you add a new key to in your address book, when you create a new payment transaction, the new key will be available in the address dropdown for you to select. It will reduce the risk of entering the wrong key when doing manually.