To set the contract layout, click on the ‘Setup’ button and you will be redirected to the Setup page.
From setup page navigate to Objects & Fields -> Object Manager.
On clicking ‘Object Manager’ you will be redirected to the Object Manager screen.
Now Select ‘Contract’.
By clicking on the ‘Contract’ module, you will be navigated to the Contract details page. Click on ‘Page Layouts’ to manage the contract page layout.
By clicking on the ‘Contract Layout’ link you will be redirected to the Edit view of the Contract Layout.
Now drag the ‘Related Contact’ field to the Contract Detail section and click on the ‘Save’ button to save the changes.