How to mark spoiler text as invisible until highlighted

A new "spoiler" button has been added to the mini-editor. It's marked S and is between the H-Headline button and the Y-Byline button. Select your text, then hit the button and it will be given a text color that is invisible until highlighted.

Also the Headline button will now make text bold as well as extra large and red Verdana and the Byline button will italicize as well as other changes.

Hugs,
Erin