It seems that "Look and Feel" is above "Theme", and it includes all visual options, such as theme, icons, GTK theme, colours, window decorations, etc.

I need to switch between dark and mode multiple times a day according to the ambient lighting. But I changing all individual entries in Appearance is time-consuming. I want an one-click method. Look and Feel seems to be that, but I cannot edit or save current state as a new Look and Feel. But there seems to be no such feature.

I wonder why there is no GUI feature to save all current Appearance-related settings as a new Look and Feel. I think I can probably do that by hand by creating/editing some files, but that would be time-consuming. It would be much easier if there is "Save current state as a Look and Feel" or "Modify" for an existing Look and Feel. In Microsoft Windows, you can easily just click "Save theme" or "Save as a theme". (Windows "theme" seems to be the equivalent of "Look and Feel" in KDE.)

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Wow, this is far more difficult than I thought... So, how do you do a simple thing like swapping the window decorator of an existing Look and Feel? I have copied an existing Look and Feel to .local and tried to edit it. "defaults" seemed to be the setting, and "[kwinrc][org.kde.kdecoration2]" seemed to be what determines the decoration. But how can I set it to Breezemite that I have downloaded? A thing like this should not have been this difficult.

Copy of Changing the Look and Feel theme defaults - viewtopic.php?f=289&p=406002#p406002
Earlier: https://www.reddit.com/r/kde/comments/8 ... _and_lock/

Changing the Look and Feel theme defaults 2

The LnF themes have the 'default' file. For the user the path is: $HOME/.local/share/plasma/look-and-feel/<THEME_NAME>/contents/defaults. You could set the default plasma/icon/color/etc theme with it. The 'defaults' file is a simple text file and you could edit it with a text editor.

There is also a dedicated tool the 'Plasma Look and Feel Explorer'. It has button 'Defaults from current setup':


Edit the Plasma theme, color, icons, etc and then click the 'Defaults from current setup' and Save:


The 'Plasma Look and Feel Explorer' is part of the 'plasma-sdk'