I recently read an article on Hybrid SEM, about how to convert an image from color to black in white. It was very informative, but what if you want to change the image back to color?
At this point you should have your black and white photo, I picked this one
Step 1:
Click Edit Item on your main tool bar and press Undo Channel Mixer.
You should now have a color image like this.
This is pretty advanced stuff so I recommend you have a spotter.