willus thanks for the reply.
I actually tried that but the issue was a usability thing for me, because I am not sure if I was getting the dimensions right.
The other issue is that sometimes the placement of those can be minus plus with scanned pdfs, especially if the pdfs are scanned with a camera device so putting hard coded numbers will most likely cut off usable parts as well.
The last issue related to it is that I personally like to have them as part of the page just in proper place, not part of the last line.
I am not sure if there is a way to achieve this maybe K2Pdf needs some kind of pattern recognition and training mode
In anycase I like this software as a desktop tool and as it being part of the Koreader.
thanks