# Security & Suspicious Activity

## Articles List

- [Security - What is "Lock Account" And How to Use it](https://core-help.sohonet.com/en/articles/85851-security-what-is-lock-account-and-how-to-use-it)
- [History Panel: View the Activity on a File](https://core-help.sohonet.com/en/articles/85854-history-panel-view-the-activity-on-a-file)
- [Suspicious Activity Overview & Monitoring](https://core-help.sohonet.com/en/articles/85855-suspicious-activity-overview-monitoring)
- [Change Thumbnail Sizes on a User Role to Prevent Screencaps and IP Leaks](https://core-help.sohonet.com/en/articles/95338-change-thumbnail-sizes-on-a-user-role-to-prevent-screencaps-and-ip-leaks)