I think lyx would be even more magnificant than it is if it helped out senile people like me that don't remember all of their latex commands when they are stuck.
For example, if I write \twohead<tab>, vaguely remembering something like \twoheadleftrightarrow, then I would like to be told whether it really exists, or whether I'm barking up the wrong tree. Probably some very simple variation on autocompletion would bring most of the benefit, even if it simply autocompleted the maximal prefix common to all commands that match the typed prefix (which doesn't require new UI elements, just looking up commands and inserting characters). Ronen says that a smarter implementation might use the status bar instead, and he's probably right, but I'd prefer a simpler implementation than none... Daniel
