I use LibreOffice 6.1 on an Ubuntu machine, but run into the problem that I see 2 blue rectangles on my slides that I can not remove. It is probably something very simple, but I can not remove it from the slides. Someone a suggestion? I now use LibrreOffice for a number of years, but it was not until 6.1 that I got these blue rectangles.
Does anyone have a solution?