Annotation display method and terminal

An annotation display method, comprising:

• transmitting, by a first device, image data displayed on the first device to a second device;
• transmitting, by the first device, a non-display control message to the second device in response to detection of switching of displayed image data;
• determining, by the first device, whether first specific image data exists in a first storage, the first specific image data satisfying a condition with respect to second image data which is displayed after the switching;
• transmitting by the first device, in a case where it is determined that the first specific image data exists, a display control message that includes a first identifier used to identify the first specific image data to the second device;
• displaying the transmitted image data by a second device;
• determining by the second device, in a case where the non-display control message is received, whether a first annotation is added to the first image data;
• hiding, by the second device, the first annotation in a case where it is determined that the first annotation is added to the first image data;
• storing by the second device, in a case where it is determined that the first annotation is added to the first image data, the first annotation in a second storage in association with a second identifier used to identify the first image data;
• and
• superimposing by the second device, in a case where the display control message is received, a second annotation stored in the second storage in association with the first identifier included in the display control message on the second image data to display the second annotation.

A terminal, comprising:

• a memory;
• and
• a processor coupled to the memory and the processor configured to:
• determine, in response to detection of switching of displayed image data, whether a first annotation is added to first image data which is displayed before the switching;
• store the first annotation in a storage in association with the first image data in a case where it is determined that the first annotation is added to the first image data;
• determine whether first specific image data exists in the storage, the first specific image data satisfying a condition with respect to second image data which is displayed after the switching exists in the storage;
• and
• superimpose, in a case where it is determined that the first specific image data exists, a second annotation stored in the storage in association with the first specific image data on the second image data to display the second annotation.