Dear Maintainer,

Square icon on the title bar is too small

"Square icon" means the icon that can make a default window into a full screen mode.
Please compare it with other default themes of GNOME, MATE, or Windows.

The problem is that there is no preference in System > Windows > Titlebar > Buttons in Desktop Menu.

Icons inside title bar are too small to use. They should be made larger that every can easily tell at just one look.

Thank you,

Green

Hi,

A quick status update, downgrading this to wishlist and forwarding it
upstream.

Your observation still holds in cinnamon 6.6.9: the titlebar button
section only offers the button layout, and the icon size is hardcoded to
16 pixels in muffin (META_MINI_ICON_WIDTH in src/meta/common.h, used by
src/ui/theme.c), scaling only with integer HiDPI scaling. The button
itself — the clickable area — does come from the GTK theme's
"titlebutton" CSS node, so it can be enlarged by copying a theme to
~/.themes and raising min-width/min-height there; the icon inside cannot.

Making the icon size configurable is an upstream change. The same request
was already made and declined in
https://github.com/linuxmint/cinnamon/issues/10814 ("There are currently
no plans to allow changing the size with some sort of GUI option"), so
I'm keeping this bug open as a wishlist item forwarded there rather than
implementing anything Debian-specific.