Click on the "Style of Labels" option.
To set the style of the text, click on the "Text style" icon.
Select the font and its size. Set the font weight - Bold or Normal. For Labels, we recommend Bold weight.
Set the spacing between letters, select alignment of the text, and choose the color of the text.
To set the style of the Labels background, click on the "Background style" icon.
Select the desired color of the background.
To set padding, click on the "Padding" icon.
Select the padding mode - At once or Individually. Select the units - pixels or percent. Set the padding according to chosen padding mode.