Edit icon missing - Report from CSV?

I'm probably just blind, but the help references an "Edit" icon on the "Report from CSV" feature so you can change the default attributes displayed. I can't seem to find that button... the help states:

8. This report displays a specific set of attributes by default, for clarity and better readability. If you wish to view more attributes/fields,

Click the Edit icon located at the extreme right end of the report's header line
In the Customize Attributes window, select the desired attributes from the list of attributes under Available Attribute
...etc...

What is this fabled "Edit" icon? I am looking at the right end of the report's header line and nothing...

Thanks!