how to highlight the different columns in Emeditor

[leo_zzz]

i try to highlight the columns 1-6, 7 separately.
with the first expression of “^.{1,6}”, column 1-6 has been highlighted successfuly, when i try to code the expression of “(?!^.{6}).” to highlight the column 7 , it failed:-(
could any one tell me what’s the problem of my expression?
thanks a lot~ 8-)

[leo_zzz]

i got it,should be “(?<=^.{6})."

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