Filloreta,
Welcome to the Forums. Please use the search feature to verify if your
question has been asked before. In fact the answer to your question
was posted just two days ago on "How do I put picture on internal wall".
Also please edit your signature line as found on your profile page to include
the Archicad version and Operating System you use. See my signature below
my user-name.
Snap
PS Search is located at the upper right corner of the GraphiSoft Forum page.