This will display the range to your focus as text anywhere on your screen at a variety of sizes.
There is not much to this addon, it just shows the text at whatever size you choose and wherever you choose to move it.
You can type /fr to get to the options screen. All options have a tooltip desription. The most important are "Scale" (to set the size) and "Enable Anchor" (to enable moving of the text).
If you have requests for features/bug reports, feel free to let me know. I would love to make this better.