The Relational System - Mastering phpMyAdmin 3.1 for Effective MySQL Management - page 181

A side menu appears when clicking the Show/Hide left menu icon. Its purpose is to
present the complete list of tables, to decide which table appears on the workspace,
and to enable access to the Structure page of a specific table. In this example, we
choose to remove the book-copy table from the workspace as shown here:
If we want this removal to be permanent, we click on the Save position top icon.
This icon also saves the current position of our tables on the workspace.
Tables can be moved on the workspace by dragging their title bars, and the list of
columns for a table can be made visible/invisible with the help of upper-left icon of
each table. In this list of columns, small icons show us the data type (numeric, text,
date), and also tell us whether this column is a key.
Defining relations
As we have already defined a relation with the Relation view, we'll first see how
to remove it. The Designer does not permit a change in a relation. However, the
Designer allows the relation to be removed and defined.