To explore: VT320 Soft Character Sets

[raphamorim]

The Digital VT320, like the VT200 Series before it, allows character glyphs to be created and sent to the terminal as a Dynamically Redefined Character Set (DRCS). In this way you can use up to 96 custom character shapes on the screen at one time. These extra characters can be used to provide letter shapes that are missing from the built-in sets, or they can even be used to pretend that the terminal has a graphics capability.

More info: https://vt100.net/dec/vt320/soft_characters