There is no 'two page mode(pdf)' in my marginnote3

there is no ‘two page mode(pdf)’ in my marginnote3

version is 3.7 on Mac Os.

please help me.

another youtube video, they have this function, but i don’t

Why is this only happening on my marginnote?

I’m using the MacBook version with an official in-app payment.

I installed it on my iPad and checked it out.
I also can’t see ‘two page mode’ on iPad.

What is causing this problem?

You first need to change the “Horizontal Flip” to "Vertical Scroll "
截屏2021-10-10 上午10.26.41