Artboard tool is selected.Creating a design variation with artboards
You now have different artboards for desktop and smartphone display sizes; the next task is to fit
the desktop-sized objects within the width of the smartphone display’s pixel dimensions.
1. In the Layers panel, expand the iPhone artboard, and Shift-select the first and last layers in
that artboard only. Don’t select the artboard name itself.2. Choose Edit > Free Transform.
3. In the options bar, do the following:
Click the Toggle Reference Point checkbox to select it; this makes the reference point
visible in the transformation bounding box, and makes it possible for you to reposition
the reference point.
Select the top left square of the reference point location option. Scaling, rotating, or
other transformations will now be performed from the top left corner of the bounding
box (instead of the center) until the transformation is committed.
Make sure the Maintain Aspect Ratio button (the link icon) is selected, so that the
selected layers will scale proportionally.
Enter 726px for Width.