Within Teamwork Projects, you can quickly add a new message no matter which part of your site you are currently in, by using the 'Quick Add' button in the top right above the search bar:
You can click the 'Add Task' option, or you can use our keyboard shortcuts by pressing 'Q' on your keyboard to bring up the menu then press 'N'.
When you choose to add a message in this menu from the dashboard or another screen outside any of your projects, you will need to pick which project you want to add it to first. You can then use the new message creation window to post the message.
Note: If you are viewing a particular project at the time, the message will be added to that project by default but you can choose a different one using the 'Change Project' button.
For more information, see: Using the Quick Add Menu