Options in SCP/Shell panel are greyed

I would like to unalias the ls command. The option to do this is in Envrironment=>SCP/Shell, but it is greyed out. How can I access the options in that panel?

keith.uk wrote:

I would like to unalias the ls command. The option to do this is in Envrironment=>SCP/Shell, but it is greyed out. How can I access the options in that panel?

You need to explicitly choose the SCP protocol.