Comment 1 for bug 839690

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Paul Sladen (sladen) wrote : Re: Topbar - close button for maximised windows in the top bar should conform to Fitts law

Enabling the left edge pixel to activate the maximised close button is probably a bad idea. The close button can result in lose of state (or work) for the user involved.

In a maximised workflow the "Fitts Law" property of the Top-Left pixel is being used to show the Launcher; in the version of Unity shipped with 11.04 hitting this pixel caused for the Launcher to show *instantly*, rather than with the delay from purely hitting the left edge.

IMHO; if this is enabled for the left-edge pixels, it should still remain disabled for the very top-left edge corner pixel. So that a flick of the mouse and accompanied by a click will not cause the present window to vanish. None of the other corners have this unique risk, and I don't believe it's valuable to enable it for the close button.

If it was minimise or maximise it would be fine, as these are reversible actions, but close is not.