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The printer specifies the non-printable area respected by Word driver, not by Word itself. Word receives information from the printer driver. If you cannot redefine the non-printable area in the printer properties settings, there may be no way to avoid this message.

To clear the warning, you must print with at least the minimum margins specified by your printer (this depends on your printer, but some sources define 0.17 inches as the "default" minimum).
You can always ignore the pop-up as it is just a warning.
How can I clear the “Your margins are quite small” printer error?
Redefine the non-printable area

First, note that the printer sets the printable margin, but Word warns you when the margin is exceeded. Word basically receives the information from the printer driver, so it is advisable to redefine the non-printable area in the printer properties settings.
To permanently clear the warning, you must print with at least the minimum margins specified by your printer. The value varies between different printer models, but 0.17 inches is usually the default minimum.
Using automatic margin adjustment
If you don't know the minimum margin value for your printer, let the program do it for you. Basically click Determine and you will notice that the position of the text in the document moves. As other users have indicated, they find the adjustments very small, barely noticeable.
However, if you don't like the result, you can undo the change or basically close the file without saving the change.

Use smaller margins
Sometimes you may need a way to decrease the number of pages printed in your document. One of the simplest ways is to use smaller margins. Basically go to the Design tab, click Margins, and select Narrow (you can also choose Custom Margins for even smaller margins). Please note that using very small margins may cause the printer to cut off some of the text.
We've found this particularly useful if you have a multi-page document with just a few sentences on the last page. Decreasing the margins will place the text on top, generally eliminating the extra page.
conclusion
Las impresoras suelen tener márgenes preprogramados que limitan el área de impresión efectiva de un documento. Para la mayoría de las aplicaciones, como algunos documentos, esto no es un obstáculo. No obstante, si está creando un documento como un user information u otro material de marketing para su negocio, es viable que los márgenes preprogramados no se adapten a sus necesidades. Para algunas impresoras, puede expandir el área de impresión ajustando los márgenes en el cuadro de diálogo de impresión del software. No obstante, sin una impresora especializada, todavía puede haber una pequeña parte de los márgenes de la página a los que no puede tener acceso.
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