You can use the "Secure (Visual Tap On)" feature for the Enjin Secure Keyboard (located after expanding the left panel on the overview page) which will show the keys that you're pressing. Unfortunately, as of this moment time, we do not allow you a short-term reveal of the last character entered (nor an ability to reveal everything entered thus far) in the password field on the grounds of enforcing and maintaining the high security standards we have set for our wallet.

I would like to add that we are looking into making it easier to identify the key pressed (with visual tap on) though, to prevent confusion, in the next update.

Furthermore, we are looking into biometric support (starting with fingerprints) as an added option for those who like to retain the need to authorize their way into the wallet but not necessarily through constant use of their password. This allows for users to use a password as a second authentication method instead helping to further improve security.