As you add or remove flies from your fly-box, you can update the image to keep it current, whilst retaining all the existing flies tagged in their position.
You might find it useful to first create 3 marks on your fly-box that you can use to easily reference the image:
Step 1: From the Action Menu, choose "Update Image"
You will be presented with the following screen:
Touch the 3 reference points in a fixed sequence.
Next, SmartFlybox will activate your device's camera and allow you to take a new snapshot. Try and align the image as closely as possible in order to ensure that the existing flies can be transferred accurately to the new image.
After taking the updated image, touch the "Use Image" button, and you will be presented with the following screen:
Touch the 3 points in the new image in the same sequence, and SmartFlybox will update the tagged flies in the new image.
If you get this all wrong, then you will need to use the "Reset ALL Flies" menu action and re-do the tagging of all the flies.