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The spans, which are shown as light gray regions, are automatically created when you add a stroke position or use any of the automated syncing tools. Spans can be resized by dragging the left or right side.
Keyframes, which are shown as vertical lines within spans, are created when you add a stroke position or when you make adjustments to one of the automated syncing tools.
This displays the stroke position at the current time in the video. You can add or move a stroke position by clicking on the white line.
A color tracker can be added by clicking on the button below the position indicator. It tracks where along a line a certain color first appears, and based on that assigns a stroking position. The target color can be changed by clicking on the square next the start arrow, followed by a click anywhere on the video to select color that is under the cursor.
The region tracker works similarly to the color tracker, except it tracks a region in the video that appears within the circle. The circle can be moved by dragging the center, and resized by dragging the outer edge.
It should not be used to track regions which changes size or rotation, though it supports minor changes in size and rotation.
At the top of the timeline you'll see different colors based on if it's synced or not. Red means it's synced where as blue means it's not synced.
Syncing is done by playing the video where it is isn't synced.
When using an automated syncing tool, any adjustments on keyframes clears parts that are synced around the keyframe.
It's recommended to make sure that the all parts of the video is synced before exporting the script. Once exported, the script file along with the synced video can be opened in a program such as ScriptPlayer.