SUMMARY Not possible to set/choose the default compiler for live-preview. PdfLaTeX is used by default. If the user wants another one, he will have to choose it for each opened file. STEPS TO REPRODUCE 1. Open a .tex file 2. Set live-preview on OBSERVED RESULT As default, live-preview use PdfLaTeX to compile. To use another compiler (as XeLaTeX) I have to switch on it for each new file (or to switch one time for existing file) EXPECTED RESULT A menu entry in the settings should be added to set/choose the live-preview default compiler SOFTWARE/OS VERSIONS Linux/KDE Plasma: Kubuntu 20.04 (available in About System) KDE Plasma Version: 5.18.8 KDE Frameworks Version: 5.68.0 Qt Version: 5.12.8