To add an experiment to your project, click on the project name from your main Projects Dashboard, then click on Setup experiments button.
Some Experiments have sub-experiments underneath them, such as a Headline experiment. You can test multiple Headlines and these are sub-experiments.
Delete Main Experiment
To delete the main experiment along with all the sub-experiments within it, click on the project name from your main Projects Dashboard, select the checkbox for the main Experiment then click on Actions dropdown > Delete experiments.
To delete the sub-experiment, click the Trash bin icon.