To print, version 1.0 of Matrex converts the content of the table (matrix or presentation) to a web page and opens a browser with it. So you can print the web page from the browser.
This works fine, but is not very professional. So why I don't print directly from Matrex? The reason is that SWT, the user interface library I'm using, does still not allow to print in Linux.
But it seems that this will change in SWT version 3.3. So I will surely add the possibility to print directly from Matrex in version 1.2, or may be even 1.1 of Matrex.