Download one of the following flowers for this tutorial by right
clicking the link and click Save Target As.
1. Open flower image. Make duplicate layer by right clicking on the layer
and selecting duplicate.
2. Make sure background copy layer is highlighted.
3. Select rectangular marquee tool
make sure feather = 0,
make a selection over the flower (about half way). You can choose either to
make a vertical selection or a horizontal selection of the flower (look at
the arrangement of the petals and decide on the best selection).
4. When satisfied with your selection hit Ctrl+J for new layer via copy.
5. With new layer highlighted Edit=>Transform => Flip
you made a horizontal selection flip vertical, if you made vertical
selection choose to flip horizontal).
6. Turn off visibility for all but top two layers.
7. Click the move tool and holding down the shift key drag selection
either vertically or horizontally, depending on original selection (i.e. if
you make horizontal selection from the top, you would drag to the bottom; if
you made vertical selection on the left, you would drag to the right).
(Holding down shift key constrains movement).
Reposition with arrow keys (which allow you to move 1 pixel at a time),
until satisfied (use zoom if necessary to check edges).
9. With visibility still off for all but top two layers, highlight top
layer and Press CtrlE (merges down layers).
10. With newly merged layer highlight, use rectangular marquee tool again
(feather still 0) but this time your selection will be the opposite of your
first selection (i.e. if your first selection was horizontal, this selection
will be a vertical selection and vice versa).
11. Once you have the selection you want, CtrlJ. Duplicate this layer by
dragging it onto new layer button at bottom of palette.
12. Turn off visibility for all but top two layers.
With top layer highlighted, Edit => Transform => Flip (flip again depends on
selection made: if horizontal, choose flip vertical and vice versa).
14. Using move tool, hold down shift key, and drag image across page
(either up or down depending on previous selections).