You can create a new task from an existing Slack message that has been posted in a channel

• Move your mouse over to the right of the text and click on the 3 horizontal dots ("More actions button")
• Select "Convert to task"
• A pop-up will appear, allowing you to create a task.
• The Slack message will be the default task summary which can be edited.
• You can assign the task to any other colleagues active on the slack workspace.
• You can add a due date and a priority to the task which is optional
• Click "Create" to create the task. (Click on close to cancel the task creation)