This was driving me crazy...after two tries at online support then three tries with phone support...whereby they told me the only way to edit the shape was to use the pre-existing shapes they have provided in "crop to shape"...and that is just not the answer
we all seem to be looking for...
So-I just figured how to do this myself!
Firstly you need to have the image saved on your system so you can use it to fill your shape. .jpg, .png, etc...
In Publisher:
Step 1 - Select Insert Shape from toolbar
Step 2 - Select Scribble or Freeform tool
Step 3 - Create or trace the shape you want the image to have
Step 4 - Select the shape
Step 5 - In Drawing Tools tab drop down Shape Fill
Step 6 - Select Pattern
Step 7 - Select Picture or Texture fill
Step 8 - Insert picture from...Select File
Step 9 - Select your image file
Step 10 - Select OK
The image will fill the shape you want
You can no longer select 'edit wrap points' from the toolbar - however if you right click on the image -- WALLAH this option appears. You can now select the nodes and move them to the exact position that you want and your image will adjust to fill the space...
WOO HOO!!!
Now I just have to fix each design that I have used this on over the last two years, seeing as how Publisher sets them back to their original image shape once you open an old file and that's a pain...
Hope this helps everyone in the Community...!!!
:-)