How to activate (show) speed of my transfered files?

I can see Destination, Transferred,Time and Progress box, but don't see Speed
as I can see in my another computer
Been thru all settings and cannot find anything to activate speed box to be shown
or any box that mark speed
Ver 1.15.5

Do you mean that you do not see the Speed column on the other machine? (the screenshot is from the machine that does not have the problem, right?)
The column is probably shrunk to a zero width. Try to resize it back.
If this does not help, delete this registry key:
HKCU\SOFTWARE\Martin Prikryl\WinSCP 2\Configuration\Interface\QueueView