The Loop Playback button lets you loop your Sequence in Adobe Premiere Pro. Here are the steps to add the Loop Playback button to the Source Window.
Click on the Button Editor icon to open the Button Editor window.
Each icon in the Button Editor window can help speed up your workflow.
For now, let's focus on the Loop Playback button.
To add the Loop Playback button to the Source Window, drag and drop the Loop Playback icon onto the Source Window.