1. Select the objects to be scaled using the Object tool (Object tool button)
  2. Choose Object->Scale selection... from the main menu.
    Infix Scale dialogue box

    1. Uniform - scale the selected objects so they retain their aspect ratio
    2. Non-Uniform - scale X and Y values independently to stretch objects
    3. Scale line width - if checked, the width of the outline around an object will be affected by the scaling. This has no effect when scaling images.
    4. Press the Copy button to scale a new copy of the selected objects leaving the original object(s) unchanged.