When there is a lookup relation between 2 objects standard/custom the lookup field on child object is intended to contain only a pointer to the ID of the parent and establish the association between the parent and the child. Also this value cannot be changed. But when i refer few examples i can see some lookup field to contain reference number and some contain name which when clicked on the child record page redirects to the parent record page.
- I need clarification on what value can and cannot be in the lookup field
- is there any possibility to change it via process builder/trigger