> May I know if it is possible to add horizontal and vertical grid
> lines to the pages as in spreadsheets software ?
> At present, I find it difficult to read the data correctly as the
> rows and columns are very close to each other.
This cannot be done with the *Reader* which is just for reading
documents (as it names says).
It would have to be done in the *source* documents prior to publishing
them as PDFs.