You can also edit the vmx file of the virtual machine, and add the line bios.bootDelay = "15000" (15000 milliseconds is 15 seconds but you can change it to whatever) and you get another screen that offers the same keys and a 15 second delay to hit them. Of course, you have to click first. You might want to shorten it from 15 seconds. But if you've been missing it you might appreciate the screen being there for 15 seconds, then change it once you've figured out how to do it.