Values in the registry are stored in keys. Keys look like folders in the SAS Registry
Editor, and appear on the left hand side (the tree view) of the window. The values
stored in the currently selected key are displayed on
the right hand side (the list view) of the window. If a key contains only subkeys,
it has a plus sign (+) next to its folder.
You can expand or collapse
a key to show or hide its subkeys by selecting the key's expansion
icon (either a + or - sign), which is located to the left of the key's
folder.
Note: In some operating environments,
you can select an expansion icon by positioning the cursor on it and
pressing the ENTER key.