The Find window looks like this.

 

 

The data column refers to the column of data you wish to search.

The kind of search offers various possibilities and the negative switch lets you make any search negative as shown in the condition at the top.

 

 

If the selected column is a Concordance column, you get options like these:

 

but if it's a numerical column you will see different options.

 

 

See also: colour categories