Sony 3803775 User Manual page 104

Note
 If you modified the default font size with [Font Size
Preference] under [Settings], return it to its original layout
to view PDF files normally.
 To view the document in a different size, use the zoom in
function.
 When you view PDF files in other than their original layout,
some functions such as highlighting or searching may not
work correctly.
Table of Contents
Reading Books
103