Transit Chart is a derived chart, so in order to calculate it you will need to cast the base chart first.

To generate a new Transit Chart, please follow these steps:
  1. Open a chart or create a new chart.
  2. Expand the Forecast menu and select the 'Transits...' menu option. The Transits Chart form will appear.
  3. Select the date, time and location for the transit and click OK. The Transits chart will be shown in the main pane.
The Transits chart is drawn in the BiWheel format with the base chart's planets shown in the inner circle and the transiting planets shown in the outer circle.