The left navigation does not display after entering the course from the dashboard.

[LIWeifan]

This issue only occurs with my account.

When using others account on the same computer, the left navigation will  appears. why?

If no left navigation, how can I join a group？

[chriscas · Accepted solution]

Hi @LIWeifan,

It sounds like you may have collapsed your course menu, which is something that Canvas remembers even after reloading a page.  You'll want to click the "hamburger" icon in the upper-left area of the screen to show the course menu again.  This is talked about in the "Collapse Course Navigation Menu" section of the How do I use the Course Home Page as a student? - Instructure Community - 504 guide if you need more info.

I hope this helps!

-Chris