The advantage of the format PDF is that it protects polices, images, graphic objects and shaping of any document source, whatever the application and the platform used to read it.

The PDF is one of the formats the most appreciated by the printers because the depiction in the printing is in accordance with what we see on the screen.


The zoom:

The zoom 100 % (Display / Zoom / real Zoom / in Acrobat Reader) called " real size " does not mean that the dimensions in the screen are identical to the document which will be printed on paper.

If you open the same document PDF to 100 % on two screens of size different, you will not obtain the same dimensions!..

We can say that the " real size " corresponds to the " real view " of the document printed in term of definition and neatness of image.

If your document PDF seems fuzzy in the screen with a zoom in 100 % it is certain that it will be of the same-mauvaise-quality in the printing.

On the contrary, if to zoom you until 200, 300, 400, 500 or 1000 % with a neatness of always correct image, you are certain to obtain a high quality of printing.


The limits of the PDF:

The limits of the PDF are the one of the size. She cannot exceed 200x200 inches or 5x5 meters.

I hear you to say myself already: " yes, but it is not rare that family trees exceed 5 meters wide! "

And well if you read this article in the order, we are exactly going to approach the subject according to whom allows us to print trees furthermore of 10 meters wide: the change of scale.


The scale:

Imagine that you want to print your document in the format A3 297x420 while your document PDF is for the format A4 210x297, that is twice as small!

And well it raises no problem, provided that your document PDF can be zoomed by keeping a very good definition in - at least 200 %. In this case, 200 % corresponds to the real size of your document printed in the scale 1/2.

Imagine now that your tree is 10 meters wide while a PDF cannot exceed 5 meters. And well it is enough to put the tree in the scale 1/2 on the PDF and to ask then to the printer to print it in the scale 2/1.

I hear you to say myself: " yes, but we do not lose any definition by enlarging twice the tree of the PDF before printing? ".

And well not, because it is created on the base in the vectorial format before being transformed into PDF.


The PDF and the vectorial:

Contrary to a "matricial" image (.jpeg.gif.png) consisted of pixels, a vectorial image will be always clear because it consists of a set of geometrical forms recalculated in every resizing.



We so avoid the aliasing, this effect of staircase on curves.

This format is thus ideal to conceive geometrical forms as family trees, for example!

Thanks to this format, we can thus "content themselves" with 5 meters wide which offers a document PDF to put it a tree in the vectorial format in the scale which we want.

Even a tree 30 meters wide can "hold" in a PDF. It is enough to enlarge it 6 times in the printing. What raises no problem because the vectorial drawing can be enlarged in 400, 800 or 1600 % without any loss of definition.


Make yourself the try of the swelling with this tree 5 generations.


Because as we saw it at the beginning of this document, the format PDF preserves the formatting of the document source whatever it is. It is this property which allows to keep the functioning of the vectorial format in the document PDF.


Here are thus all the technologies combined to conceive family trees of one very graphic high quality.