Interface Ruined; help, please

I made the fatal mistake of trying to get a double drop by hopping to a legacy world; I have done this multiple times but never had this result

suddenly, when I hopped back to normal worlds, and changed back to normal combat and interface modes (but I keep the legacy skin) the whole interface was just... ruined

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Specifically:

1. the inventory now has the individual slots outlined where it previously did not (this ruins any usefulness that transparency usually gives) 2. some burnt shark of a human decided to reduce the amount of minimap that is visible? like there re now 4 framing piece, black corners, that intrude on the minimap

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can anyone help me? I swear there used to be a setting for the inventory slots, but I cant find it; I have never seen this minimap stupidity before and cant seem to find any setting that fixes it