Thanks, NickMNS!
NO KIDDING! I had no idea how to work the Custom Button.
Start with Delete Custom Tab.
Then click on the Automatic New Tab with the + sign on it.
19 parameters selectable -
Page Reviews, Ad Requests, Impressions, Ad Impressions,
Coverage, Clicks, Page CTR, Ad Request CTR,
CTR, Ad CTR, CPC, Page RPM,
Ad Request RPM, Impression RPM, Ad RPM, Active View Measurable,
Active View Viewable, Average Viewable Time, Estimated Earnings
WOW! Where have I been?
Thanks, Nick.
My coverage is 95.7%.