Continuous manual input devices are categorized. It is rooted in the human motor/sensory system. The sub-rows distinguish between mechanical intermediary (i.e. The following table shows a classification of pointing devices by their number of dimensions (columns) and which property is sensed (rows) introduced by Bill Buxton.
It therefore controls the relative position of the cursor compared to its initial position.Īn isotonic pointing device is movable and measures its displacement (mouse, pen, human arm) whereas an isometric device is fixed and measures the force which acts on it (trackpoint, force-sensing touch screen).Īn elastic device increases its force resistance with displacement (joystick).Ī position-control input device (e.g., mouse, finger on touch screen) directly changes the absolute or relative position of the on-screen pointer.Ī rate-control input device (e.g., trackpoint, joystick) changes the speed and direction of the movement of the on-screen pointer.Īnother classification is the differentiation between whether the device is physically translated or rotated.ĭifferent pointing devices have different degrees of freedom (DOF). An indirect-input pointing device is not at the same physical position as the pointer but translates its movement onto the screen (e.g., computer mouse, joystick, stylus on a graphics tablet).Īn absolute-movement input device (e.g., stylus, finger on touch screen) provides a consistent mapping between a point in the input space (location/state of the input device) and a point in the output space (position of pointer on screen).Ī relative-movement input device (e.g., mouse, joystick) maps displacement in the input space to displacement in the output state.
In case of a direct-input pointing device, the on-screen pointer is at the same physical position as the pointing device (e.g., finger on a touch screen, stylus on a tablet computer). The following points should provide an overview of the different classifications. For example, the device's movement, controlling, positioning or resistance. To classify several pointing devices, a certain number of features can be considered. 4.2 Applying Fitts' Law in user interface design.Undo is your friend as always but it doesn’t make life easy. Once you click outside the selection you set the text. Once rotated, you can still manipulate the text while it is still selected. You cannot manually increment the rotation, you have the option for Right 90, Left 90, Rotate 180, Flip vertical and Flip horizontal. Select the Select tool in the Ribbon and draw a box around the text.You cannot select the text in isolation and rotate it. Rotation only works for the image as a whole so when placing text you will want to rotate you need to place it over an area you can rotate without it spoiling the image. With MS Paint, you don’t use layers so you have to work a little harder. As you would normally add text as a layer you can then customize it to your heart’s content. Rotating text is something we take for granted as super simple in other editing programs.
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