Step 12
To view your final printing layout without seeing all the margin guides, turn off the Show Guides checkbox near the bottom of the Layout panel (see Figure 12), or just press the keyboard shortcut Command-Shift-H (PC: Ctrl-Shift-H).
To recap the whole resizing thing: Use the Cell Size sliders to resize the photo proportionally on the page. Use the Margins sliders (or grab an individual margin and drag it) to change the position of the photo on the page, moving it to the left, right, higher, or lower. Easy enough.