1, Adobe?Photoshop CS6 for example, first open the file to be modified.
2, modify the completion, save. Find the location of the file, right-click "Properties", we can view the file size.
3, at this point you can see a 1,2M file after modification and save has more than 70M. Next, reduce the file size, first merge all layers. As shown.
4, after the merger, click "Open" - "Save As".
5, select the file needs to be stored in the location, click "Save". Cancel the "retain Photoshop editing features".
6, and finally check the file size, find the file location, right-click "Properties", you can see that the file has been greatly reduced.