Attribute fade times

It might just be me, but i remember a while ago i could change the time that an attribute would change.

Eg. by entering "colour, time, 5" the time on the colour pallet would then fade over 5s rather then 0.

I cant seem to get this to work since ive upgraded to 2.6.0

or have i just forgotten the command line and got it wrong?

its been a while since ive done this so im not sure if its me or the desk?
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