Titles on still images are more elaborate than simple white text on a black background. Title cards developed to include hand drawn borders and other images. titles on still images incorporate text with a visual image to hint the genre of the film, The development of titles accompained by still images coincides with credits getting longer to incorporate more than just name of the studio and film maker.
Studios were beginning to support the developments of more elaborate title sequences and recognized their contribution to the film as a whole. It requires combining different media to make the background. The use of music and still images accompany the credits to introduce the tone of the fill and hint to what genre and the themes in the film might be.