You can access the Gantt Templates setting in the Control Panel to add and manage Gantt templates.

Gantt templates can be used to pre-define tasks that you can use when working in the Gantt view. When you add or insert a Gantt template to the Gantt view, the tasks in the template are added to the Gantt view.

To access the Gantt Templates setting, click the following icon.

This will open the following form.

You can add as many Gantt templates as you would like.

To add a new Gantt template:

1/ Click New.

This will open a form identical to the one in the Gantt view.

2/ In the form, do the following:

a/ Add a name for the template.

b/ Click the Add button or the Insert button in the Manage section in the ribbon to add tasks to the template.

You can add tasks as follows:

You can do the following to build the Gantt template.

Once built, you can manage the template as follows.

3/ Once you have created the template, click Save or Save and Close in the top-left corner.

Gantt templates defined here can be added or inserted in the Gantt view. Once added, you can further customize the tasks in the template.

Check out this article for more details.