Can you search column formulas?

[#1]

I have a data table with a couple hundred columns. I would like to be able to search through all the column formulas to see if a particular column is used in any of the column formulas. Is this possible?

[#2]

besides the approach to highlight column used in formulas via the column background color,
one might think of adding a Indicator Symbol for Columns used in Formulas 

[#3]

@hogi this is brilliant.