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Editor view is different from preview

The editor view used to have white space, and it was same scale with the preview, but don’t know why it is smaller scale than the preview page now. The canvas shows the 1037px 100% scale for the editor view, and 1484px 100% scale for preview.

That is the Editor view

That is the Preview
Usually the toolbars should take some space on the page, but my editor view not. How can I change this?

So the space between words and image became larger and paragraph typography also changed in the preview