BankID is available for Sweden, Denmark, Finland and Norway.
To activate BankID go to "Account" -> "Extensions" and then activate "Electronic IDs" under status.
Click on the text "Electronic IDs", and there you can choose which Bank ID you want to activate.
Use BankID as sign method.
In templates, click on the dropdown list under "Sign method" and choose the BankID that you have activated. All contracts that you create from this template will have that sign method as default.
In a contract, click on the participant and choose "BankID" as sign method.