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Priyesh Misquith 12 displaying data in custom model
There should be Button on the Opportunity detail page.
On click of the Button a custom modal should be Open and should display a details from the custom_Object_c using query from apex controller.
On click of the Button a custom modal should be Open and should display a details from the custom_Object_c using query from apex controller.
Greetings!
You can create lightning component to achieve this requirement and please find the sample code in the below doc:
https://www.sfdcpoint.com/salesforce/modal-popup-lightning-component-salesforce/
Kindly mark it as best answer if it helps so that it can help others in the future.
Warm Regards,
Shirisha Pathuri