Click on Options in the function bar below the main menu and select Global Options - Print on the left.
Under Printing of picture sequence you can specify the amount of pictures per line and column to be printed onto one page (DIN A4). For 35 mm slides, the default amount per page is 40 slides (5 x 8). You can also select what additional information is to be printed out along with the pictures:
Print filenames ...prints the name of the image file for every image
Print comments ...the comments from the picture objects are used for printing the sequence of pictures in the timeline.
See also