Changing Data - Mastering phpMyAdmin 3.1 for Effective MySQL Management - page 85

Moving with arrows
Another way of moving between fields is with the Ctrl+arrows keys. This method
might be easier than using the Tab key when many fields are on screen. For this to
work, the $cfg['CtrlArrowsMoving'] parameter must be set to true , which is the
default value.
On a Mac OS X 10.5 with Spaces enabled, Ctrl+arrows are the default
shortcut to switch between virtual desktops; so this technique cannot be
used for moving between fields.
Handling NULL values
If the table's structure permits a NULL value inside a field, a small checkbox appears
in the field's Null column. Checking it puts a NULL value in the field. A special
mechanism has also been added to phpMyAdmin to ensure that, if data is typed into
the Value column for this field, the Null checkbox is cleared automatically. (This is
possible in JavaScript-enabled browsers.)
Here, we have modified the structure of the phone field in the author table, to
permit a NULL value (refer Editing field attributes section in Chapter 6). The Null
checkbox is not checked here:
The data is erased after checking the Null box, as shown in the following screenshot:
The Edit panel will appear this way if this row is ever brought on screen again.