To make the display easier to see, you can add a simple background graphic the color of which can be freely changed.
Move the display anywhere on the screen and save it as a preset to quickly apply it to your other characters (with an additional option to raise it above most UI elements).
You can go deep into customization and use any font of your choice (follow the instructions described in the Font Family selection tooltip).
Ever wondered how fast another player or an NPC is going? Movement Speed has a Target Speed feature!
Change the font, color and size of the movement speed display as you wish.
The default position of the text display is under the clock. Hold SHIFT to move it anywhere!