Help, I can't center the article

Hello everyone, I discovered some issues while using Joplin:

Why do the articles always fill the entire screen in the preview and full-screen preview interfaces?

Figure 1   Figure 2

I would like it to look like this.

Figure 3 Figure 4

I tried to set some options.

Figure 5

The reading interface became like this, but I would like it to be in the center.

Figure 6

Please tell me what I should do to make it centered while keeping margins on both sides?

(Additionally, it seems Joplin does not have text alignment options, such as left-right alignment or center alignment.)

I am facing same like 3rd and 4th figure.

I've identified the source of the issue. It's due to a plugin named "macOS Theme Plugin". Once I uninstalled it, everything returned to normal. However, I'm now facing a new problem: how can I disable this feature of clicking to add tags?