When I first started our custom object Request_for_System_Change, I didn’t check the box to allow Add Notes and Attachments – and according to the documentation SALESFOREC.com – Fields for Defining Custom Objects
this option is only available when creating new custom objects
so is there an Apex or VF way to do this?
Best Answer
This checkbox simply saves you the trouble of having to drag the Notes and Attachments related list onto the page layout.
Here I forget to do this on creating my new object. Oh no!
If I go to the UI for my new object, sure enough, no notes and attachments related list.
Go to your page layout, find the related lists. In there you will find the related list for "Notes and Attachments".
Drag that onto the related list part of the page layout.
You're all set. No worries.