docs: note exportFormFields fixes font clipping (#45)

Author: gulien

docs/convert-with-libreoffice/convert-to-pdf.mdx

@@ -331,6 +331,8 @@ curl \\
 
 Set `exportFormFields` to `false` to prevent LibreOffice from creating interactive PDF widgets, effectively flattening them during conversion. Faster than post-processing.
 
+This also fixes clipping when form fields reference fonts that aren't embedded: LibreOffice sizes the widget boxes with a fallback font, so they come out too small. Flattening removes the widgets and the mismatch.
+
 <ApiEndpoint
   formFields={[
     {

docs/troubleshooting.mdx

@@ -84,6 +84,7 @@ Since _8.33.0_, Gotenberg tolerates one transient probe failure and briefly cach
 
 - **Missing Fonts:** LibreOffice relies on installed system fonts to calculate page breaks and layout. If your document uses a font not present in the container, LibreOffice will substitute it, causing shifted layouts. Install the required fonts via a custom Dockerfile (see [Fonts configuration](configuration#fonts)).
 - **After upgrading to 8.30.0:** The font stack was simplified from 30+ packages to 8. Documents relying on Microsoft Core Fonts (Arial, Times New Roman, Calibri) now use metric-compatible replacements. If you notice layout differences after upgrading, install `ttf-mscorefonts-installer` or the specific script fonts your documents need (see [Fonts configuration](configuration#installing-additional-fonts)).
+- **Clipped Form Field Text:** When form fields reference fonts that aren't embedded, LibreOffice sizes the widget boxes with a fallback font, making them too small and clipping the text. Set `exportFormFields=false` to flatten the fields and remove the mismatch (see [Native Flattening](convert-with-libreoffice/convert-to-pdf#native-flattening-libreoffice)).
 
 ### Linked Images Missing After 8.34.0