(Lefties, you can swap these actions using Logitech’s software.) The mouse requires enough of a firm press to avoid accidental clicks, and the tactile “click” you feel is satisfyingly obvious. Instead, the entire surface of the mouse acts as a button: Press down on the left side, near the top, for a standard click press on the right side for a right-click. Like Apple’s Magic Mouse, the T631 has no dedicated mouse buttons. One minor complaint I have here is that the T631’s slightly trapezoidal shape meant that it always sat slightly crooked in my hand, though not enough to make accurate mousing difficult. You’ll need to learn to hold the T631 a bit differently than a traditional mouse, but it’s comfortable for such a small device. The T631 doesn’t provide the same hand-filling comfort, but it’s not uncomfortable, either. What I’ve always liked about the Anywhere MX is that despite being a compact mouse, it’s thick and large enough to still be ergonomic and comfortable. The T631 (left) is thin even compared to Logitech’s already-compact Anywhere MX travel mouse (right).

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