Image Editor allows for making simple changes to your images - crop, rotate, flip. You could change either images in your image gallery, or images in your Text and Images content.
To start the Image editor:
Options available in Image Editor:
When you've finished changing your image, Save and
then Exit 
. The image in Text and Images or Gallery will get automatically updated with the changes applied.
select your image and click over the Image Editor 
link you'll see in the image options on the right.
rollover the edit icon of any gallery image 
. Choose Image Editor 
from the drop-down menu.
Crop some part of the image.
After your image was loaded in Image Editor, select an area you wish to crop
(keep the mouse left button pressed and drag the pointer until you've outlined the crop area). Click Crop icon 
.
. Choose degrees for rotation.
Click Flip Vertical option 
to turn your image upside down.
Click Flip Horizontal icon 
to make a mirror of the image.
will save
your work by far so you could roll back to it later. Thus during image update you could always cancel the changes you've made since last save
by clicking Revert icon 
.
/ zoom out 
your image, or go back to its original size 
.