When you select these links, you Web browser is activated. Click on the Bookmark checkbox at the bottom of the Data Card screen. You can check the box to bookmark the Data Card. The list will automatically be saved when you quit the program. To delete a source from the bookmarks, you need to uncheck the item.
Bookmarks can be useful for creating presentations.
Click the thumbnail image or Source icon to call up the full image of the source. Once you have called up the image for the first source in the list, you can click on the right arrow at the bottom of the screen to display the subsequent source images for the bookmarked Data Cards, one at a time. In the bottom center of the screen are smaller arrows and some numbers indicating which page of the source is being displayed and the total number of pages available for viewing. Clicking on these small arrows cycles between these pages. The larger the box, the greater the enlargement.