Boundary Snap Guides

How Snap Guides work
When you take any of the following actions: then the selection boundary (or the boundary of the Time Shifted track or clip) will snap to the closest of the following physical boundaries:
 * Create a selection with the mouse
 * Modify the selection boundaries with the mouse
 * Time Shift a track or clip by dragging
 * The start or end of a track or clip
 * The start or end of a region label
 * The time position represented by a point label
 * Time zero (0 on the Timeline).

Additionally, clicking close to one of the above boundaries will automatically snap the click to the exact point of that boundary, moving the cursor position to the boundary.

Examples
In the image below, a clip in the "Guest" track is being dragged leftwards with the mouse, as shown by the Time Shift Tool mouse pointer. When the clip reaches the right-hand boundary of the second clip in the track above, a vertical yellow Snap Guide line appears through all the tracks, showing the position of the snap boundary. Once this Snap Guide is visible we can release the mouse and the dragged clip will be perfectly aligned with the one above:
 * [[Image:SnapGuideDrag.png|Yellow vertical Snap Guide visible in all tracks when the left-dragged clip aligns with the clip above]]

Snap Guides let you easily select from one physical boundary to another. In the image below we changed toSelection Tool. We can now hover the mouse anywhere close to the boundary of any clip, so that clicking at that point snaps the cursor to exactly the boundary of that clip. In the image, we clicked to snap the cursor to the left edge of the third clip in the "Host" track, then dragged the selection until it snapped to exactly the right edge of the third clip in the "Guest" track. We now see two yellow vertical lines corresponding to the boundaries we are snapping to, again extending through all tracks in the project.
 * [[Image:SnapGuides.png|A selection snapped to the left edge of a clip in the "Host" track and to the right edge of a different clip in the "Guest" track]]

The example below shows using Snap Guide to align the cursor with a point label. Using Selection Tool, we hovered then clicked at a point approximately close to the "02" label. Although we were zoomed a long way out, the click snapped to the label position, moving the cursor to exactly that point as indicated by the yellow Snap Guide line in the audio track above. Similarly, you can click to snap to either boundary of a region label.
 * Snapping to a point label.png