Change speaker for selected chunks
Step 1. Select chunks
In the Script view, select one or more chunks you want to edit.
You can select multiple chunks at once.

Step 2. Open speaker controls
In the action panel, move the toggle to Speaker.

Step 3. Choose a speaker
Select the speaker tag you want to apply to the selected chunks.
Step 4. Apply changes
Click Apply to confirm the update.

The selected speaker will be assigned to all chosen chunks.