ELECTRONIC DEVICE FOR THE INSERTION OF A PORTION OF A FIRST IMAGE TO A PORTION OF A SECOND IMAGE AND DATA TRANSMISSION METHOD THEREOF

A data transmission method for transmitting data from a first computer to a second computer includes: obtaining a first image of visual information displayed on the first computer and displaying the first image; determining whether a to-be-copied portion from the first image is selected; storing the selected to-be-copied portion from the first image; obtaining a second image of visual information displayed on the second computer and displaying the second image; determining whether a to-be-updated portion from the second image is selected; and transmitting the selected-to-be-copied portion from the first image and the to-be-updated portion from the second image to the second computer. A related electronic device is also provided.