Could not find the option to transit conceptual ERD to Logical ERD
As mentioned in support article below “Transit to Logical/Physical ERD” option is not visible.
To transit, right click on the background of your conceptual/logical ERD, and then select Utilities > Transit to Logical/Physical ERD… from the popup menu. This will form a new ERD with new entities there. You can make changes like to rename the entities and columns, or to add extra entities in the new ERD.