This can be done, but why would you want to do it that way?
A related table where each time you need to log this information, a script creates a new related record will be much simpler and more flexible to work with.
To append text to the end of text already in the field you can use exprssions such as:
Set field [Table::TextField ; LIst ( Table::TextField ; Table::NewTextToAddFIeld ]
Set field [Table::TextField ; Table::TextField & " " & Table::NewTextToAddFIeld
But it's not how I would set this up.
Attached is a visual reprentation of what I'm looking to do. I have a field in my main table that is called ID Number this field is configured as( indexed, auto enter serial,can't modify auto) it denerates a new and exclusive ID NUmber for each record in my main table.
I need to create a new table (Call Log) and establish an ID Number field in that table and link it to the ID Number in my main table?
Then fields for Project Number and Disposition, Date, time amd user?
Yes this is correct.