I try to set the Converter EPS>PNG in Tools>Preferences>FileHandling clicked From format EPS To format PNG (or PDF...) but the box Add and Modify at the right are both grayed out > I can't add the selected. I have ImageMagick installed (6.9.10-23 QT16) and lyx 2.3.3 with Texlive full and the recommended additional software for LyX. What is wrong? Wolfgang