Yesterday I was trying to change line heights to get a more condensed text. All these changes were done by using the Design tab on a block - with no result. Today I turned on my editor only to see the attached. While the lines are compressed in the Editor no change is apparent when its published. How do I get rid of this in the Editor window?

* Discovered that if now right click on a red-lined word, instead of spelling options I now get copy/paste options?