The physical dimensions of the soft slider should allow the user to read the current and target positions and position the slider with the required precision, accuracy, and response time.
Additional Information:
The length of the slider is determined, in part, by the range of values depicted, the increments between individual values, the degree of precision required for reading the slider's position, and the user's expected viewing distance. The accuracy with which the slider may be positioned may be affected by characteristics of the input device (e.g., mouse devices may allow more accurate positioning than a touch interface due to the size and irregular shape of the finger). A very short slider may be difficult to read or position precisely. A very long slider may produce slow response times due to the long distance that must be traveled and the need to keep the pointing device on its linear path.