To login as a sitter for another account, you need to login with his username and your password.
To be a sitter for someone, you need to be added by him, from User Profile, the Sitter tab.
You can decide what can be done by a sitter on your account, by picking any of the following rights:
- Demolish Buildings
- Read Emails
- Write Emails
- Delete Emails
- Conquer Cities
- Disband Troops
Each account can have a maximum of two sitters, and be sitter for two other accounts.