To turn the captions on/off, simply navigate to the editor, click on the caption tab, and the caption settings will appear. You can either turn it on/off from the screen or from the right panel.
You can also right-click on the caption in the timeline to make the show or hide settings appear.
Aside from turning the captions on or off, there are many other adjustments you can make. You can change the style of the caption, including font, decoration, size, line height, text color, highlight text color, and background color. However, please note that there is no option to adjust the timing of the captions, as they are automatically synced with the voiceover.