Output style equivalent option in Endnote Mac

Hi All,
I’m sure this there is a very simple answer to this, but I am quite baffled. 
I am trying to create a simple literature search spreadsheet with pre-specified items and have looked at video tutorials on how to export and populate my spreadsheet by customizing the output styles in Endnote. 

The issue is that I do not see ‘Output styles’ option in my Endnote 20 for Mac. In the PC version, it is found under the ‘Edit’ option. In my version, under ‘Tools’, there is any ‘Output styles’ but this appears to me to be a list of all the possible journal styles. I don’t see how I can edit this to customize a style.

I would appreciate any help.

Thank you