From KDE UserBase Wiki

    Border Toolbar

    The Border toolbar consists of 10 buttons. Each button performs a task from the menubar. Click on that task for more details.

    Button Command
    Set framestyle
    Toggle border outline
    Toggle Left Frame Border
    Toggle Right Frame Border
    Toggle Top Frame Border
    Toggle Bottom Frame Border
    Select Border Size
    Select Border Style
    Select Border Color
    Select Background Color

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