You can select and label the content you want to extract by either holding down the left mouse button and drawing a box over the content or clicking on the content.
Once you've selected the content, the Content Panel menu appears, prompting you to create a new label or assign a preexisting label to the data point.
(Optional): If you want to create all the labels for your desired content before starting your content selection process, click the Manage Labelsbutton, then click theNew Labelbutton.