1. Create a pdf.
Click the Create button on the menu bar, and then select the file source.
Used for pictures, documents, etc. , you can click the right-click menu to convert it into adobe pdf, which is easier to operate.
2. modify the pdf.
Click Tools-Content Editing in the upper right corner and select the corresponding command to modify the document.
3. Encrypt the document and restrict editing, that is, achieve the effect of read-only.
Click Tools-Protection-Encryption-Use Password Encryption to enter the password setting window.
Under "License", enter the password, and other protections default;
Select Acrobat x or later in compatibility.
After "OK", save again to complete the encryption.