Capture all keys?

[toshchak-pyos]

As I understand, keyviz displays only those keys that are pressed with modifiers (Ctrl, Alt, Win etc.).
Is there a reason why it can't do all keys? One possible reason that I can see is that it will essentially turn it into an on-screen keylogger. But honestly that would be on a person using it.

Was really happy at first to find this great tool, as I looked for something to capture keystrokes when making explainer recordings on working in Adobe-based and some other apps. This essentially makes keyviz useless, as it doesn't capture simple shortcuts such as A, V, T, B, Space (by itself) etc.