Your PDF came from a printer with crop marks and bleed extending beyond the trim area. For digital distribution you want a clean trimmed version — no crop marks, no bleed.
Cropping is the right operation. Flint's edit tool supports it.
Set crop boundaries
Open edit PDF, choose the crop tool. Drag a rectangle on the page to define the new boundaries. Anything outside the rectangle is cropped away (visually — content is preserved in the file but hidden by crop box). Apply to current page or to all pages.
Apply to every page
Most documents have consistent margins, so cropping all pages with the same boundary is what you want. Drag once, apply to all pages. The crop applies uniformly across the whole document. Pages with content extending into the cropped area are clipped at the new boundary.
Visual crop vs content crop
PDF crop modifies the 'crop box' — what's displayed. The content underneath persists in the file. Some readers reveal cropped content if their settings allow. For true content removal use redact instead. For most use cases (print-ready vs reading version) crop is the right operation.
Recover from over-cropping
If you cropped too tightly and content got hidden, open in edit PDF and adjust the crop box back outward. Original content is still there — you're just changing what's displayed. As long as you didn't flatten the page, recovery is easy.
FAQ
Does cropping reduce file size?
No — content remains in the file, just hidden by crop. To actually remove content, redact or flatten.
Will printing respect the crop?
Yes. Printers print the displayed area (the crop box), not hidden content.
Can I crop different pages differently?
Yes. Apply crop per page rather than globally if pages have different ideal boundaries.
What about bleed for press printing?
If you're going to press, keep the bleed and crop marks. Crop only the digital distribution version.
Drag, apply, save. Crop PDF pages.