Create a new prim, and Create a new script with the following text:
]
Compile it with "LSL Legacy". Close and reopen it. The compiler now reads "LSL on Mono"
What all the options do:
  • "LSL Legacy" -> "LSL on Mono"
  • "LSL on Mono" -> "LSL on Mono"
  • "LSL on Lua" -> "LSL on Mono"
  • "Lua" -> "LSL on Mono"
Viewer: Second Life Release 26.4.0.33894281402 (64bit)
Sim: Luau 2026-07-24.30110090421