Supplementing a virtual input keyboard is provided. A form and a virtual input keyboard are displayed in a display of a data processing system. An input is received selecting a particular field within the form. One or more character key sets are retrieved corresponding to previous data entries of the particular field selected. A delta set of character keys is determined based on character keys in the one or more character key sets that do not match displayed character keys on the virtual input keyboard. A set of delta character supplemental virtual input keyboards is generated based on the delta set of character keys. Then, the set of delta character supplemental virtual input keyboards are displayed in the display.