Orange boxes around menu buttons

I know it's probably in the manual but what do these orange boxes mean and how do I get rid of them?

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Nick

They mean the buttons represent toggle actions which are currently on. You can change the colour and/or the style of the indentation via Preferences, Toolbars, Appearance.

Try turning off Office 2003-style highlighting for a more standard Windows look, or change the colours to something you prefer.