Click on various text blocks if needed and check what font is stated on the sidebar to the right.Open the file in PDF Expert and go to Edit mode.Here's what you can do in order to check if it's the case and fix it:

Our app supports Apple standard fonts only - thus, if the font used in the file is not on the list, it's most probably because it's a custom font. Since there's a vast variety of PDF files out there, some of them might contain non-standard fonts - this often results in characters being garbled in the search tab or even in Edit mode.

The “trial expired” message appears after a purchase.

Set up an account for cross-platform app usage.

The search results look garbled (only Mac).

Annotations made in PDF Expert are not visible in a third-party app.

All files in the app look blank on iOS device.

Supported Scripting in XFA (LiveCycle Designer forms).

Supported Scripting in AcroForms (Adobe Acrobat forms).

Make presentations with PDF Expert and FaceTime.

Make PDF Expert your default PDF viewer on Mac.

Create your own toolset in PDF Expert for iOS.

Customize the toolbar in PDF Expert for iOS.

Transfer files between iPad and iPhone using WebDAV.

Transfer files from Safari to PDF Expert for iOS.

Transfer files between iOS device and desktop using Wi-Fi.

Sort files and folders by name, date, and size.

Create a table of contents in a PDF file.

Convert PDFs to images, Word, Excel, PowerPoint, Text files on iOS.

Convert images, MS Office and iWork files to PDF.

Convert scanned documents into text (OCR).

Text comments, shapes, and pop-up notes.Highlight, underline, and strikethrough text.

Download fonts for pages mac free