1. In a computing system comprising a touchscreen device, a computer-implemented method for performing an operation on the computing system in response to input received from a user of the touchscreen device, wherein the touchscreen device includes an interactive display device, the method comprising: receiving input from a user of a touchscreen device, the input comprising multiple concurrent touchscreen contacts; processing the input, wherein processing includes identifying the attributes of the multiple concurrent touchscreen contacts and identifying an operation to perform in response to the input; and in response to the input, performing a toggle accessibility aid operation on a computing system if the input is preconfigured to correspond to the operation.