Objects can be edited on Layers that have been marked as editable. When marking a layer as editable, that was not previously marked as editable, must be applied in the Layer Control before proceeding.
Objects can be moved, resized, reposition its nodes, add nodes or change its coordinates.
The Save and Undo Buttons will either save or undo the changes made on the editing Layer. Until the Save or Undo is selected both the original and the new object will be visible. Changes saved will be written to the Original Layer.