The first digit stores log preferences:
1 = Error only 2 = Error and empty 3 = Full log
The second digit determines the which types of agents will be displayed:
1 = All agents 2 = Scheduled agents only 3 = 'Before new mail arrives' agents only 4 = 'After new mail arrives' agents only 5 = 'All Documents are created or modified' agents only
The third digit stores security settings:
1 = Force Designer Access to Edit Agents 2 = Always use Notes API Security
The fourth digit stores preferences on whether to automatically load agent info:
1 = Auto-load on 2 = Auto-load off