Which method is used to add dissolves to multiple segments at once?

The method to add dissolves to multiple segments at once is by marking In and Out points on the track, then applying the transition to all selected segments. This approach allows you to efficiently apply a dissolve effect across multiple clips in a timeline simultaneously, enhancing your editing speed and maintaining consistency across the transitions.

When you mark In and Out points, you delineate the specific area on the timeline where the apply effect should be executed. This is particularly useful when there's a series of clips that need the same transition, saving significant time compared to applying the effect individually on each segment.

The other methods may apply transitions but typically involve a more manual process. For instance, drag and drop or right-clicking to add dissolves usually requires selecting each segment one at a time or applying the transition individually, which is less efficient than the batch approach offered by marking points. Double-clicking the transition effect is often used for modifications rather than bulk applications, highlighting the practicality of method B for streamlined editing.