An image sensing apparatus comprising: image sensing means configured to capture an object to obtain image data; saving means configured to save the image data obtained by said image sensing means; setting means configured to set parameters for use in development processing; development processing means configured to read out the image data saved in said saving means and execute development processing on the entire image data using the parameters set by the setting means to generate new image data; display means configured to perform original display of the new image data by displaying the new image data with a predetermined size; characterized in that the display means is further configured to display the parameter set by the setting means, the image sensing apparatus further comprising operation means configured to allow a user to change from the original display to an enlarged display by enlarging the image displayed on the display means and to change from the enlarged display to the original display by reducing the image displayed on said display means, wherein when said setting means changes a first parameter for which optical system correction processing is not performed and a second parameter for which optical system correction processing is performed, said development processing means executes development processing using only the first parameter, when a change to enlarged display is not made by said operation means, and said development processing means executes development processing using both the first parameter and the second parameter, when a change to enlarged display is made by said operation means. image sensing means configured to capture an object to obtain image data; saving means configured to save the image data obtained by said image sensing means; setting means configured to set parameters for use in development processing; development processing means configured to read out the image data saved in said saving means and execute development processing on the entire image data using the parameters set by the setting means to generate new image data; display means configured to perform original display of the new image data by displaying the new image data with a predetermined size; characterized in that the display means is further configured to display the parameter set by the setting means, the image sensing apparatus further comprising operation means configured to allow a user to change from the original display to an enlarged display by enlarging the image displayed on the display means and to change from the enlarged display to the original display by reducing the image displayed on said display means, wherein when said setting means changes a first parameter for which optical system correction processing is not performed and a second parameter for which optical system correction processing is performed, said development processing means executes development processing using only the first parameter, when a change to enlarged display is not made by said operation means, and said development processing means executes development processing using both the first parameter and the second parameter, when a change to enlarged display is made by said operation means.