Starting with version 2.0, the Rtl_tree gained some functionality reserved for the Rtl_mlistbox.
Secondary data can be presented in a table look-a-like fashion by specifying a size for each »visible« element.
Example 4.2. Table Look
# A Hierarchy with a table look:
rtl_tree .tree… \
-visible {
{Text 180}
{Category 0}
{Related 120}
} \
…
The Example above shows a three column table after the
hierarchy itself. »Category« is the first column starting
immediate after the hierarchy. »Related« is the second column
separated by »120« pixel from the hierarchy. »Text« is the
last column.
