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What is a coordinate?

Question

What is a coordinate?

Answer

Coordinates are pairs of numbers that are used to determine points in a plane, relative to a special point called the origin. The origin has coordinates (0,0). The origin is the starting point for finding all other points. The origin point for a page in a PDF typically starts at a page corner. The default origin for Quick PDF Library is the bottom left page corner.

Using the SetOrigin function in Quick PDF Library you can change the point of origin to be any page corner (bottom left, top left, top right, bottom right).

The default point of origin in Adobe Acrobat was the bottom left page corner up until Acrobat 8, at which point Adobe switched the point of origin to the top left page corner. As mentioned above, you can set Quick PDF Library to use any page corner in a PDF, however, the default remains the bottom left unless changed by you.


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