I need some help with adding tooltips (text visible only when hovering over an area) in a pdf.I'm working in Libreoffice writer and have a textbox added, with the "help" field filled in. This creates a tooltip viewable in the .odt file, but when exporting the file to PDF the embeded formating is lost.Is there another way to add tooltips in Libreoffice and still keep the formatting viewable in PDF format (without using adobe acrobat)?