How to display "extensions of known file types"

[iKwak]

Hello,
I was instructed to "uncheck" the box that says "Hide extensions of known file types (Tools)" in order to display the file extension.

But I can not find that option anywhere in Windows XP Professional. Could you direct me? TIA.

[moonshield]

my computer >> Tools Menu >> Folder Options >> View >> Hide Extensions For Known Types

[iKwak]

my computer >> Tools Menu >> Folder Options >> View >> Hide Extensions For Known TypesThank you very much.