I (inadvertently) have a way to distinguish GUIs when opened as root or as user
The gtk theme and icon theme and window theme I use are not system-wide and so when I open something such as synaptic or gedit or leafpad with gksudo, the window uses fallbacks which are visually very different from my themes.
I previously used to take the trouble of making logical links so that both GUIs (gksudo and normal) would look the same but now I don't.
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