Strange text formatting has appeared

Libreoffice Writer 7.0.03.1
I accidentally pressed some keys (don’t know which ones) and all my newly entered text is coloured and underlined. See attached image.
I have tried to change it using Underline, Font Colour and Highlight Colour. Nothing works. There is also this vertical line that appears at the start of the line containing the strange text which must mean something.

C:\fakepath\Libreoffice Text Problem.jpg

(edited by ajlittoz to display the screenshot)

Obviously, this is a Writer question. Please retag to replace common (unassigned problem) with writer (Writer-specific problem).

I have reopened the question because reason “duplicate question” doesn’t seem to be the right one. If it really is, please add the duplicate reference in a comment before re-closing.

Maybe you switched on the Track Changes feature accidentally.

From the menu: Edit - Track changes…

Additional warning info: keyboard shortcut for toggling “track changes” is Ctrl+Shift+C, i.e. it differs only in Shift from “copy” Ctrl+C.

Thank you. I accidentally switched Track Changes on.

@RickC: please Accept the correct answer by clicking the tick mark below the up/down vote icons on the left. Only you can do that.