The Kicad LOADUSR symbol puts its text directly into a HAL loadusr command:
Putting the same text in the LoadUsr field of a Kicad component may be tidier when there’s only one:
The gamepad symbol in a schematic:
Which produces this loadusr command in the HAL file:
loadusr -W hal_input -KA Dual # input.0.0
You can edit the text after placing the Kicad component, so the symbol can contain placeholder text.
The Smell of Molten Projects in the Morning 