David, sorry I was thinking about my Xara application that allows web pages to be created.
For MouseOver, take that to be any layer you create that can b hidden to see what your design will ultimately look like.

In you Photo & graphics application, i was assuming you could create curved lines and nodes with the Shape tool.
When using this and you have clicked onto a node, you can use the Tab key to move round the shape.
In the toolbar area you ought to see X, Y co-ords and angles.

My apologies for describing things that I use and may not be in your product.
Normally Xara deliver these bits as standard but I can't guarantee that are there for you

Acorn