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How forward selection in set analysis works? Can anyone explain it
In the folllowing chart there are 2 expressions;
the second expression is forward selection;
from help: $_1 represents one step forward, i.e. equivalent to pressing the Forward button
no selections
forward button disabled
select B
press back button
forward button enabled (don't press)
in second expression (forward selection) you see the effect of pressing the forward button, before you press it
press forward button