What you need is simply click on the relation link and click "allow creation of records" in the related table side.
To add a new record just change the value in any of the fields in the relation table.
There are times when your relation is one to many and you need to create the records in similar ways as above. Well, it is possible but you have to do a few setups.
First you must have the relation setup as mentioned before. Next you need to create a portal in the form view of the original.
If you just want to insert relation rows manually, just go to the portal and click on the last blank row and type in the new data.
To insert the new records in scripts is a bit more complicated. You need to do further setup. The first thing is you must set the portal to allow "vertical scroll". Also, you must name the portal. In your script, you need to do two things.
Go to Object; [
Go to Portal Row:[last]
After that you could just use "Set Field" to insert any value.
The setup looks simple but if you missed the "Go to Object" script, it will never work.
