On Windows, just right-click your PDF and select Properties > Read-only > OK. On a Mac computer, the process is a little more complex. Select the PDF and click File > Get Info. You can then set access rights under the Sharing & Permissions tab.
Under the 'Form' tab, you will find the 'Remove Fields' option. Click on it. A pop-up window will appear, showing all the fillable fields present in the document. You can select the fields you want to remove by checking the corresponding checkboxes.
Make sure that the security settings allow form filling. (See File > Properties > Security.) Make sure that the PDF includes interactive, or fillable, form fields. Sometimes form creators forget to convert their PDFs to interactive forms, or they intentionally design a form you can only fill in by hand.
To prevent users from editing your form fields in a fillable PDF, you must "flatten" or lock the form before saving.
Click the “Fill & Sign” tool in the right pane. Fill out your form: Complete form filling by clicking a text field and typing or adding a text box. You can add checkmarks and fill in radio buttons too.
Filling Out Non-Interactive PDF Forms with PDFpen Select the Text tool. Place the cursor where you want to add text. Next, drag to create a text box. Type your response in the text box you just created. Your text will appear in PDFpen's default font and color. Repeat the steps above to complete the remaining document.
Open the document in the PDF editor. Select Tools > Edit PDF > Add Text. Drag the new text box to the preferred location. Add text to the box and choose the formatting options.