I created a Formula Field for the object where the account number is to be displayed.
For example:
If you want the Account number to be displayed on the Contact page, create a new field, select Formula as the datatype, selected Text as the Formula Return Type - select Insert Field, Contact is in column one, then click on Account in column two, then select the Account number field from column three and select Insert button.
Add the new field to the page layout and I made the field Read Only on the page layout.
I created a Formula Field for the object where the account number is to be displayed.
For example:
If you want the Account number to be displayed on the Contact page, create a new field, select Formula as the datatype, selected Text as the Formula Return Type - select Insert Field, Contact is in column one, then click on Account in column two, then select the Account number field from column three and select Insert button.
Add the new field to the page layout and I made the field Read Only on the page layout.