Trying to use the degree symbol

Ignition
21

Works for me, tried label and markdown, just type it in, hold down ALT and type 0176.

View JSON copied below.

{
  "custom": {},
  "params": {},
  "props": {},
  "root": {
    "children": [
      {
        "meta": {
          "name": "Label"
        },
        "position": {
          "height": 32,
          "width": 194,
          "x": 73,
          "y": 65
        },
        "props": {
          "text": "Degrees °"
        },
        "type": "ia.display.label"
      },
      {
        "meta": {
          "name": "Markdown"
        },
        "position": {
          "height": 200,
          "width": 200,
          "x": 71,
          "y": 196
        },
        "props": {
          "source": "Welcome to _Markdown_ °"
        },
        "type": "ia.display.markdown"
      }
    ],
    "meta": {
      "name": "root"
    },
    "type": "ia.container.coord"
  }
}
22

... on the numeric keypad.

23

If you are using a Linux desktop, you get ° with <Compose>+o+o. (Two lowercase letter O back to back while holding the Compose key down.) Pretty easy to remember.