Annoying tips in Libreoffice Impress slide show

There’s always some annoying tips showing in Libreoffice Impress slide show,like ‘Click to select master text style’,‘Second level’ & ‘Third level’… on every slide,even in slide show mode.
How to remove it?

Never had that happen to me; check Tools>Options>LibreOfficeGeneral to see if Tips or Help Agent are set and see if unsetting them helps.