Aug 16 2020 03:37 PM
Aug 16 2020 08:51 PM
@ruotingli Are you using Classic experience? Do you have sufficient permissions on list to edit list settings?
You should have at least Edit permissions on list in order to open list settings (or Design/Full Control). Check other permission levels in this documentations: User permissions and permission levels in SharePoint Server
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Aug 16 2020 11:25 PM