If you are interested only in certain topics, you can use the Tracks filter to filter out your sessions.
If your event supports tracks filtering, you should see the filter button in the upper right corner of the Program screen.
Click on the tracks you are interested in to filter out sessions that contain them.
Now that you filtered out topics you're interested in, you can see the sessions that match your taste highlighted. Sessions of the hidden tracks will be semi-transparent.
Note: You can open both selected and un-selected sessions, the only thing that’s changed is their design.