For example, Mail puts a Print button in the action sheet next to Reply and Forward. Some apps don’t offer any printing support and, in those cases, ...

Some apps may have the Print button elsewhere. For example, to print an email message in the Mail app, you need to tap the Reply button, then find Print at the bottom of the reply options list.

Click the "Print" button, which will open a separate window. use the arrows in the address bar to select a folder in which to save the grayscale PDF. Type a name into the "File name" field and ...