Please, tell me how to change default folder icon, so that it is automatically applied to every folder across system shown in Dolphin?
I’ve already tried changing in System settings → inode → directory and chosen different icon but it didn’t work well. When I open dolphin I see that it shows first old / default icons from /usr/share/icons/breeze-dark/places/32/folder.svg and after that change them. It is very quick but I want it to show icons set by me as default.
In Dolphin, first off, you right-click the folder and go to Properties. Then go to General tab, and click the icon in the top left corner (A dialogue window will pop up). You can click system icons radio button, then select an icon category (Places in the image), and the bottom list will be reloaded with the system icons for specified category. Click other icons, and the bottom list will be reloaded with icons which are not part of your system icon theme. These icons can be, for example, icons of installed applications. Or click other icons, then click browse and find your custom image file to be used as icon for the folder. Now, click ok to finally apply the changes for real. Your folder will be now using the icon of your choice.