find out right to choose for custom theme BE setction

Hi,

we use:
– theme: Bellevue (v:1.8.5) by Themovation
– User Role Editor v:4.53 (can not update due to PHP version on the server)

The theme adds a custom menuitem to the BE menu to edit some of its contents, u can then use on your pages.

We need to add a user as editor for the purpose of editing all content but not be able to harm the system by accident or delete anything.

We used wordpress editor role to create a new role marketing to use for the new user. The custom menuitem, the theme adds, is not displayed as we login as the new user.

The theme support states that they think the custom menuitem is only aviable as administrator. Is there a way to find out the right we need to add to the marketing role to get access to the custom menuitem? Without having to trail and error every existing right combination we have within our wordpress?

best regards
Klaas