You may create a new job by selecting Create New Job displayed on the top right of your job list grid.
Once selected, you can enter a job name, a brief job description and then select the system entity. For most installations there will only be a single entity selection, however if Interrogate has been configured to accept multiple entities, you may see more than one choice available.
Click the arrow button or Enter on your keyboard.
A new job will automatically be created and you will see an empty search grid.