If the activity has GPS data, look for corners or other landmarks like road or bridge crossings that are visible on the map.

If the activity has power or cadence data, look for features like sprints at the end of a race, or times when pedaling starts/stops in corners or at the top of climbs.

If the activity has elevation data, look for hillcrests.

not

Use this tab to synchronize your video and telemetry, possibly accounting for any video edits. Note: if you are using map-only mode then you may have nothing to do here.In the simplest case your video has not been edited and contains a single continuous cut. To align the video and telemetry you must find the telemetry timestamp that corresponds to the start of your video. If you have an estimate of this value (e.g., you know you started recording video 45 minutes into the ride), then you can enter this estimate directly and then nudge the alignment using the arrow buttons. The single arrows add or subtract 1 second, while the double arrows add or subtract 15 seconds.To make sure you've got the alignment right, check how it looks at moments in the video that are identifiable in the telemetry:If you don't have a great estimate of the alignment to start with, then find a major landmark in the video and search around for it by entering timestamps directly in the text box. This is easiest if you have GPS data.If your video has been edited and contains multiple cuts (with temporal discontinuity) you will have to identify them for SUFFERvision so they can be separately synchronized with the telemetry. If you've done the editing yourself you may already know where they are, but otherwise you'll have to watch the video and look out for them (sometimes tricky if there aren't obvious transitions).For each cut requiring separate syncronization, click the "New Cut" button the moment it occurs. This will add a new row showing the video timestamp of the cut, the currently synchronized telemetry timestamp, as well as buttons for making adjustments, deleting the cut, or seeking to its start. As you watch the video the green highlighting will follow the currently active cut. To avoid confusion you'll probably want to confine yourself to making adjustments on the active row.If you would like telemetry to be shown for most of your video, butshown for a specific cut (e.g., if the cut corresponds to an instant replay in TV coverage, or to time after the race is over), enter -1:00:00 and all data will be hidden for the duration of the cut.The last thing to do on this tab (and the only thing that's useful in map mode) is to mark the finish line (assuming your activity is a race and there is a finsih line). Once you have syncronized your telemetry, find the moment in the video where the finish line is crossed and press "Mark Line". Once the line is marked the "Line" display field will show distance to this point (rather than distance to the end of the activity).If your activity was a criterium or circuit race you may also enter how many laps remained at the moment you marked the finish line (probably zero, but maybe not if you didn't finish the race). This enables SUFFERvision to compute and display a lap counter (soon anyway ... I still need to port the lap counting logic from the desktop version of SUFFERvision).