Welcome to the forums @goldeen7!
In the label node itself there should be some options for shadows, including how much of a horizontal offset it has, how much of a vertical offset, the shadow color, and more. I do not remember the property names right off though.
Another way you can have a drop shadow is copying the Label node, setting its self-modulate to black with a low alpha value, making it a child of the original label, and then offsetting its transform by a little bit so there appears to be a drop shadow. I have found that sometimes this can work better than using the Label’s built-in properties.
