This in some cases is very useful, for example when creating screencasts where one holds a single (or multiple) modifier keys WITHOUT a corresponding "other" key.

For example, when using a screen reader (NVDA in a Windows virtual machine), one can interrupt (cancel) the current output by pressing Control, or skip the current output line (and jump to the next line) by pressing Shift.

It would be great when KeyCastr would also display such key strokes. This could happen at the "keyUp" event of such a single key press.

What do you think? 👍