HEIDENHAIN iTNC 530 User Manual page 196

In addition, you can perform the following functions by mouse:
Sorting function
By clicking a column of the table head, you sort the data in
ascending or descending order (depending on the active setting).
Moving columns
You can arrange the columns in any sequence you want by clicking
a column of the table head and then moving it with the mouse key
pressed down. The TNC does not save the current column
sequence when you exit the tool management (depending on the
active setting).
Showing additional information in the fillable form view
The TNC displays tool tips when you leave the mouse pointer on an
active input field for more than a second and when you have set the
EDIT ON/OFF soft key to ON.
196 Programming: Tools