How do I send a message in a discussion thread and set its recipients in the new V5 desktop version?

1. Enter keywords in “Search Topic Name” on the left, then click the discussion thread you want to open. 2. Write your message in the “Enter Message” field at the bottom. To attach a file, click the paperclip icon. 3. Click “Send to…” to set the recipients, and check the visibility notice “Only visible to colleagues.” 4. After confirming the message and recipients, click “Send.”