Making text span multiple columns is easy, but how do I make text span multiple rows?
Many authors are aware of some, but perhaps not all, of the generally-accepted guidelines for laying out formal printed tables:
Currently, there is no mechanism for an author to request a rule between 2 rows. Usually, this is not a problem, but it brings us by a roundabout route to the topic of this tip: rowspan markup. To make a simple table cell span 2 or more rows, add 2 or more + signs after the cell content. The number of + signs defines the number or rows spanned. For example, ||my text+++ || will cause the cell to span 3 rows.
Markup for rowspan illustrates the usage.
In the PDF, one might reasonably wish to insert a rule between rows 4 and 5, to separate the birds from the trees. Currently, there is no mechanism for an author to specify this. Implementing such a feature is fairly easy; choosing suitable markup is more difficult. It just doesn’t seem right to introduce special markup that only applies to the PDF version of the page.