Order the images before uploading
Name or arrange images in the exact order you want the pages to appear. Start with the cover or first page, then continue in sequence. This prevents a technically valid PDF from becoming confusing to read.
Fix orientation and crop
Rotate upside-down photos and crop large empty borders before combining them. Straight, tightly framed document images create a cleaner PDF and are usually more comfortable to view on a phone.
Do not use more resolution than you need
Huge camera images for every page can make the final document unnecessarily heavy. Preserve readable text, but do not chase maximum resolution when the purpose is ordinary screen reading or assignment submission.
Review the first and last page
Open the beginning, the end, and one page in the middle. Confirm order, orientation, and the clarity of the smallest text. A short review catches most mistakes before you send the file.
Lighting and perspective come before conversion
For phone photos, keep the camera as parallel to the page as possible and use even light without a strong shadow across one edge. Turning a dark or skewed photo into PDF does not repair the source; it only places that image into a document. A clean source produces a clearer, often smaller, and easier-to-read PDF.
Keep margins reasonably consistent
If one page is tightly cropped while another has a large empty border, the final document can feel uneven even when every page is readable. Use similar cropping and orientation for comparable pages, especially for assignments and multi-page forms.