With this dialog-box, you insert new permanent entries. 
In Chapter 5.4 of the description the box was declared 
detailed.

Additionally to the normal keys of a dialog-box you can 
close this box with <ESC>. The <RETURN>-key (on the 
numeric-keyboard, too) has two different functions. At 
first, it works like the <TAB> key. The "Entry" button will 
be framed simple. If you are in the text-field, this button
is framed double. Now the <RETURN> key executes the 
entry. 

The Dialog box doesn't close after executing an entry. So you
can enter many entries, one by one. You close the box by
using the "Cancel" button. In this moment all values will be
deleted.