What changes occur when performing a Rolling Edit with the Alt or Option key pressed?

When performing a Rolling Edit with the Alt or Option key pressed, the primary effect is that the audio and video portions are treated separately. This allows for independent adjustments to the timing of these components without affecting their synchronization. In a rolling edit, you typically adjust the in and out points of adjacent clips, but by using the Alt or Option key, you can roll the edit point while keeping the audio and video tracks distinct, enabling more precise control over their alignment.

This functionality is particularly useful in scenarios where you want to adjust video timing without inadvertently shortening or lengthening the corresponding audio track. It ensures that both elements can be edited flexibly, preserving their original relationships unless intentionally altered.