Making the Main Menu Vertical

The only template option for a new main screen is “Main Screen with a top Menu”
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How do I change this top menu to a vertical side menu ??

Hi.
Now all projects created with a side menu by default.
To revert changes delete the created menu and change jmix.ui.mainScreenId property in application.properties file from MainTop to <project_id>_MainScreen.

Regards,
Natalia

yes, the default main screen comes with a horizontal menu, but I want to make a NEW main screen with a horizontal men, is there no other way to do this without reverting my project?

We have planned to add a side menu template in our next releases, unfortunately, there is no other way yet except reverting changes in the project.

Regards,
Natalia