There are 2 relatively easy ways.
- For the standard, garden variety page numbers, the font used is called "Page Small Text" in the |File|Page Setup...|Fonts (Tab) dialogue - simply increase the size from the default of 8. This has the drawback of affecting ALL text entries that use "Page Small Text"
- If you have looked at "User Objects" at all, you can use the "PageTxtMaestro" and "PageTxt" objects to replace the default page numbering and you can select alternative display fonts in the "PageTxt" object. Just remember to turn page numbering OFF in |File|Page Setup...|Options (Tab).
The PageTxtMaestro system is introduced here:
https://forum.noteworthycomposer.com/?topic=9215.0
To check to see if it is already installed; simply open a score, press <J> to open the object dialogue, press <p> to take you to the "p"s in the list and if you have it installed then you will see "PageTxt.nw" and "PageTxtMaestro.nw" in the object type list.
The "PageTxtMaestro" objects are quite powerful and can give excellent results when you learn to use them effectively.
Thanks for the tip about Page Small Text. A simple way to accomplish it.