Folding paper on Shabbos

Hi,

Folding garments makes them more wearable, by eliminating wrinkles and sharpening creases. Therefore, folding garments on Shabbat may be prohibited, under the categories of מתקן מנא (improving an implement) or כיבוס (laundering). However, neither of these applies to paper, and so one may fold paper on Shabbat.

There is an additional reason to permit folding paper table napkins: they are disposable, and meant to be disposed of.

(Rivivot Ephraim 1:223:8)

Have a great day,
Mordechai