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.
(edited by ajlittoz to display the screenshot)