Goes at the top of a page while you write or rework it over several edits, so others know to wait. Take it off when you finish, and no later than a day after you put it on.
Example
{{In use|Your username}}
Being written
Your username is working on this page now. To keep out of each other's way, wait for them to finish before you edit it, or ask them on their talk page. If this box has been here for more than a day, take it off.
At the top of a page while you work on it over several edits. Take it off when you finish.
| Parameter | Description | Type | Status | |
|---|---|---|---|---|
| Your username | 1 | So others can ask you on your talk page. | User | suggested |