If your wallet is encrypted, message content is protected until you unlock your wallet. To do this open:

1. Open the console by selecting Help 

2. Click on the Debug Console option. 

3. In the textinput at the bottom of the screen enter:


walletpassphrase [password] [time]

Replace [password] and [time] with your wallet password and the time in seconds for which you want your wallet to be unlocked.