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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
forward button disabled
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
forward button disabled