Q:

How to unselect (blank) in .AutoFilter?

Here is how to select only blank values in column 1 : 
.AutoFilter field:=1, Criteria1:="(blank)"

How to unselect those blanks  . How to select anything but blank
.AutoFilter field:=1, Criteria:<>"(blank)"  ?

A:

.AutoFilter Field:=1, Criteria1:="<>"

You could try recording macro while manually doing the filter.

