Stored pixels and displayed orientation
Some image files contain orientation information that tells a reader how to present the pixel data. The displayed photograph can therefore be portrait even when the stored edge order looks landscape. Browser decoding may already apply that orientation instruction.
A second automatic correction would turn the image again. PrintLilt uses the displayed orientation for its working dimensions and preview. Judge the visible result with a recognisable feature such as an upright person, a horizon, or readable text, rather than relying on the filename.
What a quarter-turn changes
A 90-degree or 270-degree rotation swaps the width and height. A 4000 × 3000 image becomes 3000 × 4000 in the rotated working orientation. The number of pixels is unchanged, but the relationship to a fixed landscape frame changes.
A 180-degree rotation keeps the width and height pair while turning the scene upside down. It is a composition change, not a new resolution. Do not confuse rotation with a change to the target’s dimensions or with the addition of pixels.
The frame has its own orientation
An 8 × 10 inch portrait frame and a 10 × 8 inch landscape frame use the same physical size in different orientations. Choose the one that matches the intended presentation. Rotating the frame does not automatically make an upright portrait photograph into a suitable landscape composition.
For a 4000 × 3000 landscape source in a 10 × 8 frame, fill retains 3750 × 3000 pixels. If you instead use an 8 × 10 portrait frame without rotating the source, the retained region becomes 2400 × 3000 pixels. That is a much tighter side crop, not a harmless label change.
Position the crop after orientation is settled
Once the photo is upright and the target orientation is correct, move the crop to protect the subject. Recheck any focal position after a rotation because horizontal and vertical relationships have changed. A location that protected the left edge before a quarter-turn is not the same visual edge afterward.
Reset the crop if the result becomes difficult to interpret, then select the target size and position again. Compare fit when the new orientation removes too much of the scene. Keeping the whole image may be more appropriate than forcing a narrow crop.
Check the downloaded result
Open the exported image in another viewer and confirm that it is upright, has the expected pixel dimensions, and shows the selected region. For a layout PDF, also check paper orientation and the physical photo rectangle. The screen preview and the exported file should describe the same decision.
Keep the original file available throughout the process. A rotated or cropped derivative is useful for printing, but it should not become your only copy of the source. Saved project settings can reproduce a choice; they cannot replace an original that was never included or retained.