Browse to pick a Song.

You can type the name of a Song or type the Song's ID number to make the cursor jump to it.

Click the "+New" button or press CTRL+N to add a new Song.

Right-click for a pop-up menu that lets you choose if you want to "Pick" this Song, or if you want to edit it.

Press CTRL+F or click "Filter" if you want to filter the list to only show Songs that match a certain string of text.

Press F2 if you want to adjust the volume.