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Give it a try

Intro

PDF Region Pro works with the APEX region Read Only attribute. Whenever the expression of the read-only attribute evaluates as true, PDF Region Pro is rendered in read-only mode. Please note that when the editor is in Read Only mode, The header bar is completely empty, you will not be able to save, edit, update any of your documents this way!

Use the button at the top of the page to toggle the Read Only attribute.

Notice about read only mode

The region attribute overpowers any custom function returning document permissions. For example, if the Read Only attribute is set to Always and the custom function results allow the modification, the editor will run in read only mode.

Demo