How to reverse cycle through the palettes using cycle operator

[saqimtiaz]

@arunnbabu81

I think it must be possible to reverse cycle through the palettes by using negative value in the cycle operator. How to do it by using a modifier key ?

That is actually a nice approach using the stepsize parameter to cycle:

\whitespace trim
\define cycle-palettes()
<$let stepsize={{{ [<modifier>match[alt]then[-1]else[1]] }}}>
<$set name=pals filter="[all[tiddlers+shadows]prefix[$:/palettes/Captivate]]">
<$action-listops $tiddler="$:/palette" $field="text" $subfilter="+[cycle<pals>,<stepsize>]"/>
</$set>
</$let>
\end