1. On the main pipeline view, click on the Tasks icon on the project card the document is related to.
2. Select the task from the task tree the document is related to. A side panel will open to reveal more data connected to this task.
3. Add the document by pressing the +Document button in the middle of the side panel and selecting it from your computer.
4. Check the Permission tab on right side menu on this panel to find out and update which groups have access to view or edit this task.