19. An information processing apparatus comprising: a display unit configured to display a preview screen; and a central processing unit which executes a program stored in a memory, wherein the central processing unit functions as: a selection unit configured to select a storing function in accordance with an instruction input in the preview screen; and a display control unit configured to control the display unit to display the preview screen, wherein information of document data and a preview image based on the document data are displayed in the preview screen, wherein if the storing function is selected, the information of the document data is displayed in the preview screen after printing for the document data, and if the storing function is not selected, the information of the document data is not displayed in the preview screen after printing for the document data, wherein a first preview image based on first document data is displayed in the preview screen if first information of the first document data is selected in the preview screen, and a second preview image based on second document data different from the first document data is displayed in the preview screen if second information of the second document data is selected in the preview screen, wherein if the first information is selected in the preview screen and print setting information is changed, print setting information of the first document data is changed and print setting information of the second document data is not changed, and wherein if the second information is selected in the preview screen and print setting information is changed, print setting information of the second document data is changed and print setting information of the first document data is not changed.
19. An information processing apparatus comprising: a display unit configured to display a preview screen; and a central processing unit which executes a program stored in a memory, wherein the central processing unit functions as: a selection unit configured to select a storing function in accordance with an instruction input in the preview screen; and a display control unit configured to control the display unit to display the preview screen, wherein information of document data and a preview image based on the document data are displayed in the preview screen, wherein if the storing function is selected, the information of the document data is displayed in the preview screen after printing for the document data, and if the storing function is not selected, the information of the document data is not displayed in the preview screen after printing for the document data, wherein a first preview image based on first document data is displayed in the preview screen if first information of the first document data is selected in the preview screen, and a second preview image based on second document data different from the first document data is displayed in the preview screen if second information of the second document data is selected in the preview screen, wherein if the first information is selected in the preview screen and print setting information is changed, print setting information of the first document data is changed and print setting information of the second document data is not changed, and wherein if the second information is selected in the preview screen and print setting information is changed, print setting information of the second document data is changed and print setting information of the first document data is not changed. 20. The information processing apparatus according to claim 19 , wherein each of the first information and the second information indicates a document name.