BankID is available for Sweden, Denmark, Finland and Norway.
To activate BankID go to "Account" -> "Extensions" and then activate "Electronic IDs" under status.
Now you can choose which Bank ID you want to activate.
For Swedish Bank ID the bank handles each application manually and it takes 5-7 days for the bank to approve your application. The other BankIDs can be used right away.
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.