Arrows

[#1]

Back takes users to previous rendering OR last screen if they haven't altered any of the filters

[sushil353]

It returns you at previous selections..

[#3]

how can i implement?

[tresesco]

Selections from the Back stack can be used as set identifiers, by use of the dollar symbol: $1 represents the previous selection, that is, it is equivalent to pressing the Back button.

sum( {$1} Sales ) ->returns sales for the previous selection.