In the Header & Timeline find the following features to help playback and view your Song.

Song Play: Play / Stop the song from the playhead position, or press the spacebar on your keyboard to toggle this.

Play From Start: Quickly move the playhead to the start of the song for playback, or press shift + spacebar on your keyboard.

Song Zoom In / Out: Click on the - or + magnifying glass to zoom in & out.

Select multiple Scenes and Audio Track Clips in the Song View by left-clicking and dragging over the objects you wish to select.
This can be used to move or delete (pictured) multiple Scenes and/or Clips at the same time.
Playhead: Click on the timeline to adjust the playhead position.
Song Loop: Make the Song Loop active, by using the loop enable/disable button.
Change the Song Loop region by left-clicking, dragging and releasing the Song Loop itself, or by left-clicking and dragging the handles at the start and end of the Song Loop.

Adjusting Track Height: Resize the height of the Scenes Track or Audio Track’s in your session for more precise editing in the timeline, by clicking and dragging at the bottom of a track. 
Clicking on the arrow to the right of the Scene or Audio Track label will allow you to quickly change the height between the original setting, and your new, custom height.
Duplicate Scene: Holding alt/option on your keyboard while clicking and dragging a scene or slice of an audio track will duplicate it.
Extend or Truncate Scene: Clicking and dragging on the edge of a Scene will extend or truncate the Scene. Extending a Scene into the path of another Scene will truncate the latter, to accommodate the newly extended Scene.
Timeline Display: Right-click on the timeline to show Time (default), or Bars & Beats:

Mute/Solo: Clicking the Mute button will mute all of the audio from the selected Scenes or Audio Track. Click the button again to unmute the audio.

Clicking the Solo button will play audio from the selected Scenes or Audio Track. You can Solo multiple tracks at once by holding Command/control and clicking the Solo button.

Record: Arm your audio track ready for recording external audio inputs.
NOTE: An audio track must be selected to use this feature.

Channel Input selection: Use this to select the appropriate channels on your audio interface for recording.

Input Monitor: Use this to enable and disable input monitoring for your recorded signal. Use the included mini-meter for a quick idea of input gain and to check the input does not clip (turn red)

For more information on recording in Serato Studio, check out the Misc : Record section.