[TxMt] Column selection navigation

[Robert M.Zigweid]

I'm probably daft and just not finding it, but what I cannot find is a 
way to navigate inside of a columnar selection.  There are several 
situations in which I want to make a change in the middle of a column 
selection, instead of the edge, or even more likely more than one 
change in said selection.  Simple arrow movement certainly isn't the 
way as that undoes the selection.  What is the obvious thing that I'm 
missing?

Regards,

Robert
-- 
Robert M. Zigweid                           rzigweid at zigweid.net
                                             http://rzigweid.zigweid.net
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