Lichess Screen very much enlarged

Hello, the pages graphics of Lichess appears very much enlarged. But only the graphics. Menues and characters appears correctly sized. If I select Learn/Tactics I see only three/four empty squares of one enormous chessboard.
Help please.
Emiliano

Maybe you're zoomed in. Try doing ctrl - to make it smaller, or if you're on a mac then cmd -. This should make it smaller.

Thanks, I'll try asap