How can I signify the ability to edit something in a table?

In the below image I have a table where new IDs can be added by clicking the "Add ID" button and then each ID has entries that can be added to it. It seems confusing to new users but I can't think of a simpler way of doing this. Any ideas?

To clarify, here is roughly the structure I am trying to provide the users access to:

Pages of IDs that each have a series of one or more "entries" that in turn each has some operating parameters and other data entered by the user.

Currently it is a table where the ID is clickable to access all the entries about that ID and the second two columns are clickable as a unit to access that entry.