DFreds Chat Pins is a FoundryVTT module that allows pinning messages to the chat.

• Easily pin or unpin any message by right-clicking it
• View an entirely separate chat log of all the pinned messages by pressing the button above the message box
• Jump to the location of the pin in the main chat log by right-clicking it in the pinned chat log
• When flushing the entire chat log, all pinned messages will remain

See the documentation page for details.