> For the complete documentation index, see [llms.txt](https://docs.tlic.cmu.ac.th/cmu-zoom-manual/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.tlic.cmu.ac.th/cmu-zoom-manual/setting-up-meetings/meeting/security.md).

# Security

![](/files/ysIPdaHhBeglE1jwdPKf)

For security settings, when you press the shield symbol, the following menu will appear:

![](/files/SsILl77yh2ucNIy6jnOx)

* Lock Meeting: Lock the meeting room to prevent anyone else from joining.
* Enable Waiting Room: Activate the Waiting Room feature.
* Hide Profile Pictures: When selected, the meeting room will not display the profile pictures of meeting participants, only their names will be shown.
* (Allow participants to : ) Share Screen/Chat/Rename Themselves/Unmute Themselves/Start Video: Permit meeting participants to perform activities marked with a ✔ in front of them.
* Suspend Participant Activities: Disable cameras, microphones, Zoom, and screen sharing for all participants, and lock the meeting room to prevent further access.