When you load a lecture, you are taken directly to the "View" tab. The window is dominated by a list of all the pages included in the lecture. There are two ways to navigate through the lecture:
First, you can click on the page names in the list. You will be taken to the page you clicked on (see above). Second, you can click on the buttons at the bottom of the View tab. Following is an explanation of all the buttons:
First This button will take you to the first page in the lecture, no matter where you were.
Previous This button will take you to the preceding page in the lecture.
Current This button will take you to the current page in the lecture. This requires a bit more explanation: when giving a lecture, you are perfectly free to click on any of the normal links on the lecture pages, or even visit content completely outside visual endodontics. This is useful for instance in answering audience questions by diverting to another page for a while. When you are ready to get back to the lecture, just click on "Current" in the Lecturer window, and you will be taken back to where you were.
Next This button will take you to the next page in the lecture. The basic way of giving a lecture is by first clicking on "First", and then clicking on "Next" to step through the pages, until you reach the last page.
Last By now you have probably guessed that this button will take you to the last page in the lecture.
In the normal configuration, the Lecturer window is so large that it covers up a good portion of the browser window. You can minimize the lecturer window by clicking on the minimize button at the top right-hand corner of the window. The minimized window takes up a lot less space. You can move it by dragging the "Player" text around. A good place to put it might be at the top of the screen, so that the browser window is not obscured. To restore the normal Lecturer window, double-click on the "Player" text in the minimized window.
Please experiment with the Lecture player and the View tab, using one of the example lectures. You won't break anything, so don't worry. The basic logic of stepping through lectures in order, and jumping around if necessary, is quite straightforward.