If you are trying to name specific pages in a PDF document, you can use a PDF editor like Adobe Acrobat or Foxit PhantomPDF. These programs allow you to edit the PDF metadata, including the page labels.
To add page labels in Adobe Acrobat, follow these steps:
Open the PDF document in Adobe Acrobat.
Go to the "Pages" panel on the left side of the screen.
Right-click on the page you want to label and select "Page Labels".
In the "Page Labels" dialog box, select "Start New Label" and enter a name for the page label (e.g., "Front Cover").
Repeat this process for each page you want to label.
Click "OK" to save your changes.
Once you have added the page labels, you can export the PDF with the correct page numbering by selecting "File" > "Export" > "PDF" and choosing "Document and Markups" under the "Export Settings". This will preserve the page labels and the corresponding page numbers in the exported PDF.
Alternatively, if you don't have access to Adobe Acrobat, you can use a free online PDF editor like DeftPDF (https://deftpdf.com/pdf-editor) to rename the pages and then export the PDF with the desired page numbering.
Full disclosure: We're the developer of the tool we recommend and we think it can help you, hence the recommendation. We would be happy to see you try it to help you and you can send a message/comment if there's further assistance needed.