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I have mislabelled the y-axis in my pdf graph that I generated from an Matlab file. Unfortuantely, I cant find anymore the data that I used to generate the graph. So I am wondering if there is an free tool that allows me to rename the y-axis in my pdf diagram? Are there any free tools available that could be helpful or is this something "impossible" to do?

Many thanks for your help, Andrea

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imho, the simplest solution would be to get a pdf editing program, get the picture /diagram/ out, edit it in some sort of photo manipulation program, and jam it back in afterwards. –  ldigas May 25 '10 at 15:02

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You can alternatively import the file into photoshop and edit it with the text tools (and eraser) and then print it back into a .pdf.

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Inkspace is good, for this purpose. It is a free tool for editing vector graphics files, similar to Illustrator or CorelDraw.

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