You should always try to work with vector PDFs created from the source instead of creating PDFs from scans. Vector PDFs are usually preferred to raster PDFs because they contain more data that make it easier to work with. Most PDFs created from CAD (Computer-Aided Design) are vector-based. VectorĪ vector-based PDF uses line segments to define all of the geometry on the page. The lines and characters on the page will either change to a grid of square dots or become blurry. To determine if a PDF is a raster image, or scan, just zoom in very closely. Therefore, there are no lines for the Snap to Content function to snap to, and no text to select or search. This means that a scanned or raster PDF only contains a grid of dots that represent lines and text it does not actually contain lines or text that a computer can recognize. A scanned PDF is created by making a bitmap image (like a JPEG or TIFF) of the page, and placing that image on the PDF page. One example of a raster PDF is a file created from scanning a paper. Raster PDFĪ raster image is created from a series of square dots called pixels. Let’s look at the difference between raster and vector content in a PDF. The page may appear to contain lines and characters, but the underlying elements that represent them in the PDF may not be vector lines and text elements, which are needed to snap to content and search and select text. Some PDFs contain more information than others, even though they seem indistinguishable at first. The reason both of these occur is that PDFs aren’t all created in the same way. You cannot edit text using Edit > PDF Content > Edit Text.You’re unable to snap to an object when taking measurements.
RASTER LAYER VS VECTOR LAYER HOW TO
How to determine whether your PDF is raster- or vector-based, and how this affects the ability to snap to an object or select text.
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