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using.html

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+<h1> Using the system </h1> 
+
+<ul>
+<li> During video playback, use the subtitles and the scroll bar to
+navigate. Clicking the subtitles is a fast way to skip forwards and
+backwards by small amounts.
+<li> If you are on a low-resolution display, the left navigation bar
+can be hidden by clicking on the set of three left arrows next to it.
+<li> If you need bigger or smaller fonts, use your browsers settings
+to scale them up or down. Under Google Chrome, this is done by
+pressing ctrl-plus, or ctrl-minus at the same time.
+
+</ul>