In Instagantt (Standalone version), a workbook is a collection of one or more projects. It is the place where all of your Gantt charts will reside.
You will find the mission control center of your workbook on the right side of your chart. The menu is where you can select on which selection of projects you want to work on. Your workbook will provide the perfect structure to keep all of your projects in a single list.
You can also have more than one workbook. In order to create a new workbook, head over to your workbook and select + New workbook. A dialogue will appear and you will then be asked to name your new workbook. Once you click on Create, your new workbook will be ready for Gantt chart action.
Also, by heading over to Workbook Settings, you can easily control and manage your workbook titles, members for each of your projects, and resources.