https://www.epo.org/en/node/can-1

Can I use the chat feature during oral proceedings?

The chat feature should be used for short, general messages such as "I need a break" or "I have connection issues". It should not be used for sharing content relating to substantive issues. As other participants can see what you have written, you should also refrain from entering any sensitive data such as contact details.

Depending on the technology you use, the full functionality of the chat feature may not be available. Please do not rely on the chat feature for communication between different virtual rooms.