Within Teamwork Spaces, you can use the Draw.io widget to add custom diagrams to your pages.
Open the page you want to add the page list to, and select Edit in the top right corner.
When viewing the page in edit mode, select the + to the right of the WYSIWYG editor bar and choose Draw.io from the dropdown menu.
A Draw.io panel will be added to your page contents. Click Create Diagram to open the diagram editor.
Using the editor, you can add a variety of shapes, arrows, flowcharts, and other items. Once you have completed your diagram, click Save to return to your page.
The diagram will be visible within the Draw.io panel in your page contents. You can use the field at the bottom to add a caption for your diagram.
Click Publish to save the diagram to your page.
For users viewing the space, they will be able to see the diagram and title within the page contents.
For more information, see: Using the WYSIWYG Editor