When set to True, this property prevents user's input in the editor; it also blocks execution of all 
editing-style methods.
property ReadOnly: Boolean;
This property does not affect 
viewer-style methods.
Editor hides the caret in read-only mode, if rvoHideReadOnlyCaret is in EditorOptions.
Hypertext in read-only mode works automatically (user does not need to press and hold Ctrl key), if rvoNoReadOnlyJumps is not included in EditorOptions.
Default value:
False
See also events: