Currently in Microsoft Q&A we only support English, could you please edit your question into English?Then we can help to understand your issues, thanks for your understanding.
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I would suggest you go to File > Options > Display, check whether there are 3 options like the following image.
If yes, please tick the boxex of "Page tabs appear on the left", "Nagivation bar appears on the left" and "Vertical scroll bar appears on the left".
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