MVVM: How cab I add/move images in canvas

I think defining Canvas children and their location via XAML is pretty obvious. If the problem is doing it programmatically, this is what it is:

Adding: The property Canvas.Children is of the type UIElementsCollection; it has all required methods, such as Add(UIElement), Clear(), and so on:
https://msdn.microsoft.com/en-us/library/system.windows.controls.canvas%28v=vs.110%29.aspx[^],
https://msdn.microsoft.com/en-us/library/system.windows.controls.panel.children%28v=vs.110%29.aspx[^],
https://msdn.microsoft.com/en-us/library/system.windows.controls.uielementcollection%28v=vs.110%29.aspx[^],
https://msdn.microsoft.com/en-us/library/ms603589(v=vs.110).aspx[^].

Moving could be a bit more confusing if you are unfamiliar with dependency properties. This is done by using the 4 (or just 2) Canvas.Set*(UIElement, double) methods:
https://msdn.microsoft.com/en-us/library/system.windows.controls.canvas.setright(v=vs.110).aspx[^],
https://msdn.microsoft.com/en-us/library/system.windows.controls.canvas.settop(v=vs.110).aspx[^],
https://msdn.microsoft.com/en-us/library/system.windows.controls.canvas.setright(v=vs.110).aspx[^],
https://msdn.microsoft.com/en-us/library/system.windows.controls.canvas.setbottom(v=vs.110).aspx[^].

The generalized by untyped methods of setting dependency property values are these two:
https://msdn.microsoft.com/en-us/library/ms597473(v=vs.110).aspx[^],
https://msdn.microsoft.com/en-us/library/ms597474(v=vs.110).aspx[^].

See also: https://msdn.microsoft.com/en-us/library/vstudio/ms752914%28v=vs.100%29.aspx[^].

—SA