Is it possible to introduce a way of annotating a 'Secured' document? The resulting file will be a PDF file not searchable but text highlight will be possible. In Advanced Print Setup check the box 'Print As Image' and click OK.In (Windows OS) Print dialog box select the 'Microsoft print to PDF' printer option, then click on Advanced,.Open the file in Adobe Acrobat Reader DC and choose Print,.
This will also highlight over the character itself and the effect is not as good as the real Highlight. If you are not satisfied with the color and opacity then right click the rectangle, click Properties and change its appearance.
In Adobe Acrobat Reader DC two workarounds can be used:
