You have three simple ways of saving a cleaned image:
Click the Save button on the toolbar. Your image will be saved using its original name.
Click the File menu and choose "Save". Your image will be saved using its original name.
Using the shortcut key Control-S (ie. pressing the “Ctrl” and “S” keys together.
If you wish to save it in a different name, you may choose to click the File menu and choose "Save as". This function uses a file selector menu to assist in choosing the location and name of the file to save.
The “Save” function is not available if :
No image is loaded.
You have already saved your image. However, you may still use "Save as" and save your image in a different name.