Why did the index on the page disappear?

Question

Previously, each document page had an index of each chapter, which made it easy to jump and view the outline. Why did it suddenly disappear?

Answer 1

Apologies for the inconvenience. We are in the process of updating our website's design, which might affect how it appears depending on the size and resolution of your screen.

Could you please specify the page where you're experiencing issues, and also provide the dimensions of your screen in pixels (width by height)?

We are going to change our setting to try to fix this one.

Thanks!

P.S.: As a temporary workaround, you might find that adjusting the zoom level on your browser (using CTRL -/+ keys) could restore visibility to the index.

Comments

Thanks for your explanation, I tried CTRL - and it worked.
After I opened the developer tools, I found that the index will only be displayed when the width is dragged to greater than 1780px, and will not be displayed after it is less than 1780px.