Viewport parameters

[gauthierDC]

Hi,
I would like to open a document to a specific region through the command line using the /A argument.
The idea is to open the file and fit the view to the red rectangle:

image.png

image(1).png

In the documentation, I can read:

viewrect=<left>,<top>,<width>,<height> – sets the view rectangle using float or integer values in a coordinate system where 0,0 represents the top left corner of the visible page, regardless of document rotation. Use the page parameter before this command.

I tried this:

Code: Select all

.\PXCEditor.exe /A "page=1; viewrect=100,100,200,300" test.pdf

With these arguments, I expected the program to open the document and fit the view to the red box. The rectangle is located at 100,100 from the top left corner and is 200 pixels wide and 300 pixels high. Instead, I got this:

image(2).png

What am I missing?

test.pdf

[Dimitar - PDF-XChange]

Hi,

In the documentation, I can read:

May I ask in which page of the manual you saw these instructions?

EDIT: Found it.

It does work on my end.

May I ask for you full command line and tell me how you excute it?

[gauthierDC]

Here is the link to the documentation I used: https://help.pdf-xchange.com/pdfxe11/in ... ns_ed.html

The previous command line is exactly what I am trying on my example file.
I run it in the PowerShell terminal, in the PDF-XChange installation directory:

Code: Select all

PS C:\Program Files\PDF-XChange\PDF Editor> .\PXCEditor.exe /A "page=1; viewrect=100,100,200,300" test.pdf

With these arguments on my test file, the view does not fit to the entire red box as I would like (screen #2 in the first post). Instead, I get the result shown in screen #3.

Thank you for the help.

[rakunavi]

Hello all,

Just for reference regarding the coordinate system of the command-line parameters (like FitH, top):
The value in PDF-XChange Editor is calculated based on the following relationship (referencing RFC 8118 Section 3):

• (inch) x (Windows display scale) x 96
• (inch) x (PDFXCE resolution value)

• https://www.rfc-editor.org/rfc/rfc8118.html#section-3

If the position is shifted, it's usually because the input value doesn't account for the current Windows display scale or the application's DPI resolution. The editor itself is rendering exactly where it is told to.

You may also find the following topic helpful:
viewtopic.php?t=44201

Best regards,
rakunavi

[gauthierDC]

Ah! Thanks a lot for the tip!
It was indeed related to screen resolution.

Adding the usept=yes argument works perfectly:

What does work for me:

Code: Select all

PS C:\Program Files\PDF-XChange\PDF Editor> .\PXCEditor.exe /A "page=1; viewrect=100,100,200,400, usept=yes" test.pdf

I've always had trouble understanding the concepts of resolution and zoom.
In my mind, an A4-sized PDF viewed at 100% zoom should have the same magnification as if I were printing it on A4 paper at 100%.

[Stefan - PDF-XChange]

Hello gauthierDC,

Glad to see you sorted it out.
And yes - when Windows scaling is involved, some setting up is required for the on screen 100% to match the 100% on paper.

Kind regards,
Stefan