You can add a markdown tile to your Azure dashboards to display custom, static content.
To add a markdown tile to your dashboard:
Select Dashboard from the Azure portal sidebar. If you've created any custom dashboards, in the dashboard view, use the drop-down to select the dashboard where the custom markdown tile should appear. Select the edit icon to open the Tile Gallery
In the Tile Gallery, locate the tile called Markdown and click Add. The tile is added to the dashboard and the Edit Markdown pane opens.
Edit the Title, Subtitle, and Content fields to customize the tile. In the example shown here, the markdown tile has been edited to display custom help desk information.
Select Done to dismiss the Edit Markdown pane. Your content will appear on the Markdown tile, which can then be resized by dragging the handle in the lower right-hand corner.
Hope this helps!