A terminal for marking a paper ballot which lists a plurality of candidates and which includes a marking space for each candidate which can be either hand-marked by a voter, or machine-marked by the terminal. The terminal scans the ballot to determine the ballot format, and then presents candidate selection options to the voter. Candidate selections are entered through a touch screen menu or through an audio menu and are accurately marked on the front and back sides of the ballot in marking spaces corresponding to the selected candidates. A skew correction mechanism ensures accurate marking.