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+---
+title: Resolving Headers Not Showing in Viewer and Font Substitution Issues
+description: Learn how to fix the issue where headers do not appear in the viewer but show in the designer, and address font substitution warnings.
+type: how-to
+page_title: Headers Not Displaying in Viewer and Font Issues in Telerik Reporting
+meta_title: Headers Not Displaying in Viewer and Font Issues in Telerik Reporting
+slug: headers-not-displaying-in-viewer-font-substitution-telerik-reporting
+tags: reporting, pageheadersection, headers, font, arial, noto-sans
+res_type: kb
+ticketid: 1704889
+---
+
+## Environment
+
+<table>
+   <tbody>
+      <tr>
+         <td>Product</td>
+         <td>
+            Reporting
+         </td>
+      </tr>
+      <tr>
+         <td>Version</td>
+         <td>19.2.25.1001</td>
+      </tr>
+   </tbody>
+</table>
+
+## Description
+
+I encounter issues where headers placed near the bottom of the [PageHeaderSection](https://docs.telerik.com/reporting/api/telerik.reporting.pageheadersection) are not visible in the viewer but display correctly in the designer. Additionally, the first item in a report sometimes appears with a different font, and a warning message indicates that "Font 'Arial' is substituted with font 'Noto Sans'." 
+
+## Solution
+
+### Resolving Headers Not Showing in Viewer
+
+Headers positioned near the bottom of the [PageHeaderSection](https://docs.telerik.com/reporting/api/telerik.reporting.pageheadersection) may not appear in the viewer due to rendering boundaries. Follow these steps:
+
+1. Move header textboxes higher within the PageHeaderSection.
+1. Ensure header elements, such as column headers, are within the visible bounds and not near the bottom edge.
+
+For detailed guidance, refer to the knowledge base article: [Textbox element not showing or part of text hidden in a page section]({%slug text-cut-or-hidden-in-page-header%}).
+
+### Resolving Font Substitution Issues
+
+To address the "Font 'Arial' is substituted with font 'Noto Sans'" warning:
+
+1. Check if the Arial font is available on your server or container. If not, copy the font to the server or container using the following Docker command:
+   
+   ```
+   
+   docker cp C:\Windows\arial.ttf CONTAINER_ID:/usr/share/fonts
+   
+   ```
+
+1. Ensure the font is embedded in the report using the [privateFonts]({%slug telerikreporting/using-reports-in-applications/export-and-configure/configure-the-report-engine/privatefonts-element%}) configuration.
+
+1. Use the same font across all report items to prevent inconsistencies.
+
+Refer to these articles for further details:
+* [The first instance of a report item is with a different font than the rest]({%slug font-is-incorrect-on-first-render-azure%})
+* [The font of the first few report items is not consistent with the rest]({%slug inconsistent-font-of-the-first-few-report-items%})
+
+## See Also
+
+* [PageHeaderSection Overview](https://docs.telerik.com/reporting/api/telerik.reporting.pageheadersection)
+* [Textbox element not showing or part of text hidden in a page section]({%slug text-cut-or-hidden-in-page-header%})
+* [The first instance of a report item is with a different font than the rest]({%slug font-is-incorrect-on-first-render-azure%})
+* [The font of the first few report items is not consistent with the rest]({%slug inconsistent-font-of-the-first-few-report-items%})
+* [privateFonts Configuration]({%slug telerikreporting/using-reports-in-applications/export-and-configure/configure-the-report-engine/privatefonts-element%})