CC2014: how to get rid of blue lines around elements?

Hi People,

I must have inadvertently changed some kind of display setting,

because now in DW's split or "live" view, I get a blue outline surrounding

everything I click on; it shows a little blue box with class ID, etc

on the upper left.

I really dislike this particular editing mode, and want to go back

to the way I've been editing in DW for 10 years or more.

Can anyone tell me how to turn this feature off?

Thanks!

(ps using in Mac / Yosemite)