Hi list, I keep getting the following CSS validation errors for my "custom.css" file in oXygen V25: * Unknown pseudo-element or pseudo-class “:no-tags” * Negative values are not allowed: -0.5em /(padding)/ * Property “margin-inline-start” doesn't exist : 0 This is annoying because the "Results" window keeps popping up whenever I save a dita file. How can I tell oXygen to ignore these elements/properties/values? I can't find the required settings under "Options > Preferences > CSS Validator". Frank -- *Frank Dissinger* Documentation Manager .................................................................... *CGS Publishing Technologies International GmbH* *Email *frank.dissinger@cgs-oris.com | *Web* www.cgs-oris.com <http://www.cgs-oris.com/> *Address* Kettelerstr. 24 | D-63512 Hainburg | Germany *Phone* +49 6182 9626-27 | *Fax* +49 6182 9626-99 *Commercial register* Offenbach, HRB no. 21495 *Managing directors* Bernd Rückert, Christoph Thommessen https://www.cgs-oris.com/Signatur.png <https://www.cgs-oris.com/signatur>