You can add a timeline (also known as a sequence) in Premiere Pro by dragging a media file to the "New Item" icon.
Here's a more detailed explanation:
- Drag and Drop Method: Locate the video clip you want to use for your timeline. Click and drag the clip from your Project Panel onto the "New Item" icon (which looks like a page being turned) located at the bottom of the Project Panel. Premiere Pro will then automatically create a new timeline with settings that match the clip's properties (frame rate, resolution, etc.).
This method is quick and easy, especially if you want your timeline settings to automatically match your video clip.