Trim margins from every page of a PDF by an exact amount, in points, on each edge.
Trims a fixed margin off each edge of every page in a PDF - useful for removing scanner borders, cutting down oversized margins before printing, or tightening a page for embedding elsewhere.
Points (1/72 of an inch), the standard PDF page-geometry unit - a US Letter page is 612×792 points.
No - it sets each page's crop box, which changes what's visible/printable. The original content underneath is still technically in the file, the same way most PDF editors handle cropping.
Not in this tool - the same four margins are applied to every page. For per-page control you'd need a different tool for each page's dimensions.