A printing control apparatus configured to instruct an image output apparatus to perform printing based on print data, the image output apparatus being configured to perform spot color printing by using a coloring material of a spot color, wherein the printing control apparatus comprises: a preview image display unit that is configured to display a preview image for checking at least one spot color printing portion where the spot color printing is carried out, characterized in that the printing control apparatus further comprises: a first obtaining unit that is configured to calculate and obtain a first preview image resolution for checking a printing layout based on a print setting included in the print data and on a size of a region to be displayed on the preview image display unit; a second obtaining unit that is configured to calculate and obtain a second preview image resolution for checking the at least one spot color printing portion based on a drawing command included in the print data, which is a drawing command for at least one object of the at least one spot color printing portion, and on the size of the region to be displayed on the preview image display unit, wherein the second preview image resolution is a minimum resolution enabling preview display of the smallest object extracted from the at least one object of the at least one spot color printing portion; and a resolution comparing unit that is configured to compare the first preview image resolution calculated by the first obtaining unit with the second preview image resolution calculated by the second obtaining unit, wherein the preview image display unit is configured to display the preview image by using a higher resolution out of the first preview image resolution and the second preview image resolution as a result of comparison by the resolution comparing unit. a preview image display unit that is configured to display a preview image for checking at least one spot color printing portion where the spot color printing is carried out, characterized in that the printing control apparatus further comprises: a first obtaining unit that is configured to calculate and obtain a first preview image resolution for checking a printing layout based on a print setting included in the print data and on a size of a region to be displayed on the preview image display unit; a second obtaining unit that is configured to calculate and obtain a second preview image resolution for checking the at least one spot color printing portion based on a drawing command included in the print data, which is a drawing command for at least one object of the at least one spot color printing portion, and on the size of the region to be displayed on the preview image display unit, wherein the second preview image resolution is a minimum resolution enabling preview display of the smallest object extracted from the at least one object of the at least one spot color printing portion; and a resolution comparing unit that is configured to compare the first preview image resolution calculated by the first obtaining unit with the second preview image resolution calculated by the second obtaining unit, wherein the preview image display unit is configured to display the preview image by using a higher resolution out of the first preview image resolution and the second preview image resolution as a result of comparison by the resolution comparing unit. a first obtaining unit that is configured to calculate and obtain a first preview image resolution for checking a printing layout based on a print setting included in the print data and on a size of a region to be displayed on the preview image display unit; a second obtaining unit that is configured to calculate and obtain a second preview image resolution for checking the at least one spot color printing portion based on a drawing command included in the print data, which is a drawing command for at least one object of the at least one spot color printing portion, and on the size of the region to be displayed on the preview image display unit, wherein the second preview image resolution is a minimum resolution enabling preview display of the smallest object extracted from the at least one object of the at least one spot color printing portion; and a resolution comparing unit that is configured to compare the first preview image resolution calculated by the first obtaining unit with the second preview image resolution calculated by the second obtaining unit, wherein the preview image display unit is configured to display the preview image by using a higher resolution out of the first preview image resolution and the second preview image resolution as a result of comparison by the resolution comparing unit.