/usr/share/cinnamon/thumbnails/gtk-3.0/README is in cinnamon-common 3.6.7-8ubuntu1.
This file is owned by root:root, with mode 0o644.
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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 | HOW TO MAKE A GTK THEME THUMBNAIL?
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- Install ImageMagick ("apt install imagemagick")
- Open a terminal and run "cinnamon-preview-gtk-theme mytheme" (where mytheme is the name of the Theme you want to thumbnail)
- Press Alt+Print-Screen to take a screenshot of the window
- Go to your Pictures directory and move the screenshot to ~/screenshot.png
- Open a terminal and type:
cd
convert screenshot.png -gravity north-west -extent 120x35 thumbnail.png
WHICH THUMBNAIL IS USED BY CINNAMON TO REPRESENT A THEME?
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- Cinnamon first tries to find a gtk-3.0/thumbnail.png file in the theme directory
- If it doesn't find any, it looks in /usr/share/cinnamon/thumbnails/gtk-3.0/
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