To return the size of image to the original size,

1. Click on the "Tools" menu, and then click on "Options" to open the Options dialogue box.


2. Click the "Import" tab to open the "Import" page.


3. Under the "Options for Importing Images", select "Original Size" from the Import size list, and then click the OK button.
   


4. In the Layout window, select the inserted image.


5. Hold down the Ctrl key and press the F5 key.
   The size of the imported image will return to the original size.