Open the PDF in Preview
Click the Markup toolbar button
Use the text, highlight, shape, or signature tools to edit
Drag to move or resize added elements
Save the file with Command + S
Use File > Export as PDF if you want a new copy
If the PDF is scanned, use OCR in a compatible app before editing
Use Adobe Acrobat or another PDF editor for more advanced changes
To replace pages, use the thumbnail sidebar and drag pages as needed
To delete pages, select the page thumbnail and press Delete
To add pages, use Edit > Insert or drag in pages from another PDF
To change text directly, use a dedicated PDF editor
To annotate only, use Preview’s markup tools
To fill forms, click form fields and type in them
To sign documents, use the signature tool in Preview
To compress or convert the PDF, use File > Export or a PDF utility app