The Display (Or Port) window in the Log-In Window appears to only
display 3 digits. This is confusing because, as a first-time user,
when I entered 5900 for the port, only the last 0 appeared. I was
unsure wether the port selected was 5900. When I erased the 0
then the 590 showed in the window.
Since I believe that it is common to use 4 digit port numbers,
widening the port window to show 4 digits would seem appropriate.