How do I know if a document is encrypted?

If you want to know if a document is encrypted or not, follow these steps:

Open your document and tap on the "info-symbol" to open the index information.

     

Now you can see if your document is encrypted or not when checking the "lock-symbol" in the upper right corner. No lock-symbol means your docurement is not encrypted.

When you tap on the lock-symbol a pop-up message confirms "This document is encrypted".