It is possible to drag and drop columns in a Guided Decision Table to re-order them; however it is currently impossible (and arguably should remain impossible) to re-order individual "BRL Variable Columns" because their order is determined by the underlying BRL definition, which is based on RuleModel. For example

Person( age == @{age} )
Income( bonus > @{bonus} )

It should not be possible to re-order "age" and "bonus" since the IPattern objects would need re-ordering in the RuleModel. Obviously the scenario gets more complicated with more complex BRL definitions.

This all said and done; when hovering over a "BRL Variable Column" header the mouse pointer still changes to a "hand" suggesting the column can be moved. The flag for "movable" columns exists at the column-level whereas it needs to be moved to the column header meta-data.