From this page you can change the visual appearance of KDM.
The greeting string is the title of the login screen. If the string contains the word HOSTNAME it will be translated to the domainless name of the machine KDM is installed on.
KDM logo is the image which will be shown on the login window. If you do not specify a logo the default $(KDEDIR)/share/apps/kdm/pics/kdelogo.xpm will be displayed.
To change the logo you can:
Drop an image file on the image button.
Click on the image button an select a new image from the image chooser dialog.
As the style of the user interface is selected on a per user basis you can also select which style should be used initially by KDM. You can choose between Motif or Windows style.