Translations:Tutorials/Force Transparency And Blur/11/en
Create a transparency Kwin rule > make everything unimportant. Thus, it will apply to everything. FORCE the active or inactive opacity to how much you want in the very last tab.
Create a transparency Kwin rule > make everything unimportant. Thus, it will apply to everything. FORCE the active or inactive opacity to how much you want in the very last tab.