You can add a markdown tile to your Azure dashboards to display custom, static content.
To add a markdown tile to your dashboard:
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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
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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.
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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.
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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.
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Hope this helps!