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| # Collab Chat | |
| Chat with your group in real time, without leaving the trip planner. | |
| <!-- TODO: screenshot: chat panel with messages and reactions --> | |
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| ## Where to find it | |
| Open the trip planner and select the **Collab** tab. If the Chat sub-feature is enabled, a Chat panel appears — on desktop as the left column, on mobile as the first tab in the tab bar. | |
| The Collab addon must be enabled by an admin and the Chat sub-feature must be turned on. See [Real-Time-Collaboration](Real-Time-Collaboration). | |
| ## Sending messages | |
| Type in the input field at the bottom and press **Enter** (or click the send button) to post. Hold **Shift + Enter** to insert a line break without sending. | |
| Messages load in pages of 100. A **Load more** button appears at the top of the chat when older messages are available. | |
| ## Emoji | |
| Click the smiley-face button in the composer to open the emoji picker. The picker has three categories: | |
| - **Smileys** — facial expressions and gestures | |
| - **Reactions** — hearts, fire, thumbs, and similar | |
| - **Travel** — planes, maps, food, cameras, and destinations | |
| Emoji are rendered via Twemoji for consistent appearance across platforms. | |
| ## Reactions | |
| **Right-click** a message on desktop (or **double-tap** on mobile) to open the quick-reaction menu. Eight quick reactions are available: ❤️ 😂 👍 😮 😢 🔥 👏 🎉. Click any reaction to toggle it on or off. Reactions from all users aggregate beneath the message; hover a reaction badge to see who reacted. | |
| ## Replies | |
| Hover a message to reveal the action buttons. Click **Reply** to quote that message. A preview of the quoted text appears above your new message in the composer; click the **×** to cancel the reply. The quoted text is displayed inline inside your bubble when sent. | |
| ## URL link previews | |
| When a message contains a URL, TREK automatically fetches an Open Graph preview (title, description, and thumbnail image) and displays it below the message text. Only the first URL in a message generates a preview. | |
| ## Message styling | |
| Your own messages appear **right-aligned** with a blue bubble. Other members' messages appear **left-aligned** with a gray bubble. The username is shown above the first message in a group of consecutive messages from the same person; the avatar is shown beside the **last** message in that group. Timestamps appear below the last message in each group. | |
| Messages that consist of only 1–3 emoji are displayed larger without a bubble. | |
| ## Deleting messages | |
| Hover your own message to reveal the delete button (trash icon). The delete button is only visible when you have the `collab_edit` permission. Deleting replaces the bubble with an italicised notice — showing your username, "deleted a message", and a timestamp — visible to all members. | |
| ## Read-only viewers | |
| Users without the `collab_edit` permission can read all messages but the composer is disabled — they cannot send, react, or delete messages. The reply button is visible to all users, but completing a reply still requires `collab_edit` (the send button is hidden for read-only users). | |
| ## Related pages | |
| [Real-Time-Collaboration](Real-Time-Collaboration) · [Collab-Notes](Collab-Notes) · [Collab-Polls](Collab-Polls) | |