Side menu problem

After I removed the side menu, how can I set side menu again?

when my second time to set side menu, it won’t show.

Why do you remove it?
You can also use the “lock sidemenu” or “unlock sidemenu” block.
Then the user can not longer open the side menu.

But I dont know what you want to do.

When I removed it ,I want to show the return button

I have test it. If I lock the side menu and show the return button, when I click the return button ,it will open the side menu.