Hi @wilsonl28824783 ,
There is no OOTB capability for this, but the customisation is very straight forward using a Java api for generating PDF.
1. create a custom servlet with pdf selector
2. Overlay the menu to add a new button which invokes this URl with this selector
3. This servlet should in turn call the java api like [1]
Similar use case on [2]
[1] - https://github.com/wooio/htmltopdf-java
[2] - https://experienceleaguecommunities.adobe.com/t5/adobe-experience-manager/convert-aem-page-to-pdf/m-...