Patent Document ID: 9785327
Application ID: 13478886

Base Claim:
1. A computer-implemented method, comprising: displaying an electronic document on a touch screen of an electronic device; defining a left region, a center region, and a right region associated with the touch screen, the center region located between the left region and the right region; associating with the left region a previous page command to display a previous page of the electronic document; associating with the right region a next page command to display a next page of the electronic document; associating with the center region a command to display or hide a control object; detecting a first touch input in the center region; displaying the control object based at least in part on the first touch input, the control object displayed with an opacity set to a last used opacity level; receiving, by the control object, a second touch input representing a swiping movement on the touch screen; and controlling, by a processor of the electronic device, a perceived visible brightness of the electronic document based at least in part on the second touch input by increasing or decreasing the opacity of the control object.

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Claim 4:
4. The computer-implemented method of claim 1 , wherein the opacity of the control object is adjusted based at least in part on a direction of the second touch input, a speed of the second touch input, a location of the second touch input on the touch screen, a predetermined opacity increment, or a current opacity level of the control object.