GaussView 6 includes features for setting up follow-on jobs starting from a checkpoint file. You can now specify an optimization plus frequency job and increase the basis set size. It also now allows you to indicate that the molecular structure and job title should be retrieved from the checkpoint file, along with the initial guess and the Cartesian force constants from the previous job. On the Link 0 panel, you can use the OldChk field to specify the checkpoint file from the previous calculation. There are also options to compute polarizabilities, optical rotations, and to read incident light frequencies. The Preview tab shows all the chosen settings are correct before the calculation is saved and run.