According to implementation of [wml_message], it is visible in chat if to_chat=yes https://wiki.wesnoth.org/LuaAPI/wesnoth#wesnoth.logPersonally I never used those options. I use [chat] from WML and wesnoth.message() or print() from Lua. In fact, for debugging it is especially useful to avoid macros since then I can reexecute WML without having to leave scenario.
Code:
function wml_actions.wml_message(cfg)wesnoth.log(cfg.logger, cfg.message, cfg.to_chat)endStatistics: Posted by Ravana — Today, 6:19 pm