When you disable clickjack protection, the Account Engagement tab displays normally, but
disabling clickjack protection can make your Salesforce org less secure.
Required Editions
| User Permissions Needed |
| To modify session security settings: |
Customize Application |
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From Setup, enter Session Settings in the Quick Find box, then
select Session Settings.
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In the Clickjack Protection section, deselect Enable clickjack protection for
customer Visualforce pages with headers disabled.
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Save your work.