To reach this options page, select View > Options... > Text Comparisons > Column Filter
Use the controls on this page to specify columns of characters that should be ignored when comparing lines. This can be useful when comparing files that contain well-formatted tabular data if you have difficulty constructing suitable regular expressions.
Enable column filter
Check this option to enable the column filters entered below.
Column filter edit field
Enter the columns that you want ignored when comparing lines. Column numbers should be separated by commas. To specify a range
of columns, use the format n-m. You can omit the second number in the range to leave the range open-ended, in which case the range extends to the end of
the line. Columns are numbered starting from 1 (not 0).
For example:
1-8,10,12,14,80-Note: tab characters are counted as a single column character, irrespective of any tab expansion options that have been set.
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