Display method for changing the display format of an image group based on a side length ratio

A display apparatus comprising:

• a display configured to display an image group, in the displayed image group, a plurality of images being arranged side by side in a first direction, the plurality of images having a first image;
• a memory configured to store a program;
• and
• a processor configured to execute the program so as to:
• rotate the plurality of images arranged on a first virtual axis about each of second virtual axes intersecting the first virtual axis;
• and
• rotate the plurality of images about the first virtual axis,
• wherein a first length of a first side of the first image in the first direction or a second length of a second side of the first image in a second direction which intersects the first direction is set such that when a ratio of the first length of the first side of the first image to the second length of the second side of the first image is within a predetermined range, a shorter length between the first side and the second side is set to be constant in each of the plurality of images in the image group, and when the ratio is outside the predetermined range, a longer length between the first side and the second side is set to be constant in each of the plurality of images in the image group, and
• wherein the predetermined range is a range of 1/√2 or more and √2 or less.