The catalogue contains talks downloaded from over 50 sites, details of which (including the site address) are given at the start of each section.
How to use the Catalogue Using the Catalogue is fairly straight forward with the slider bar. There are also page forward and back buttons located on the Tool Bar at the top of the Catalogue, the third group in from the right. Note, allow the document time to download from its remote storage site.
You will probably want to zoom in to increase the readability of the document...... make sure that you have "clicked" on the catalogue. Then either select "View" from the Menu bar at the at the top of your browser and go to "Text Size". OR just hold down the control key "Ctrl" and press the plus key "+", repeat this until it's right for you.