Combining images into a PDF is simple, but the result is better when the source images are prepared first. Page order, orientation, readability and file weight all affect whether the finished document feels like one coherent file or a pile of photos.
Fix orientation before combining
Rotate each source image so text is upright. If one page is sideways, readers may need to rotate the entire viewer just to read it. Consistent orientation also makes printing more predictable.
Put pages in final order first
Rename or sort your images so the first page, second page and attachments are obvious. The Images to PDF tool lets you arrange the selected images, but a clear source order reduces mistakes.
Crop unnecessary background
If the images are photos of paper documents, crop away desks, shadows and large borders when possible. This makes the content easier to read and can reduce the amount of image data that needs to be stored.
Balance resolution and file size
Text needs enough resolution to remain readable, but phone photos can be far larger than necessary for an on-screen PDF. Resize or compress copies if the final PDF becomes difficult to upload or send.
Review the final PDF page by page
Open the downloaded PDF and check order, orientation and readability. Make sure no page was duplicated, omitted or accidentally cropped before sending the document.