The CSS property "letter-spacing" is important when programming Java FX user interfaces which are designed by graphics designers using a creative design tool such as Adobe Photoshop. In such tools designers will often use letter spacing to ensure a more visually appealing look of textual contents.

However, the CSS property "letter-spacing" has no effect yet when using Java FX, as can be seen by invoking
myText.setStyle("letter-spacing: 2px");

Without the letter spacing property developers will have to render each and every letter of a text separately in order to space them. This will most likely lead to a slower rendering performance, and - obviously - a lot more coding.