Showing and Hiding Hierarchy
Levels
Use
When you display a list as a hierarchy, you can show or hide subordinate data.
A hierarchy level
is created in the first column from every hierarchy column (see Setting Hierarchy
Columns). Each entry of a hierarchy level that contains subordinate data
is indicated by a small arrow icon 
. Lower hierarchy levels are slightly indented.
Data from the lowest hierarchy level is indicated by a point.
The Airline column contains the names of airlines. The Flight Number column contains the flight numbers for all flights. The remaining columns contain detailed data for the flights for each airline, such as flight date, and price.
You have set the Airline and Flight Number columns as hierarchy columns. In the first column, Airline/Flight Number, the flight number is listed (slightly indented) under every airline.
Each airline
and flight number is indicated with an arrow icon . The rows in the lowest hierarchy level, which
contain the data for the flight date, price, and so on, are indicated with a
point.
You can show and
hide the subordinate entries of a hierarchy by choosing the small arrow icon
for that hierarchy level.
Prerequisites
● You are displaying a list as a hierarchy (see Showing and Hiding Hierarchies).
● You have set at least one hierarchy column (see Setting Hierarchy Columns).
Procedure
...
1. To show the subordinate data of an entry in the first column, select the entry.
The direction
of the arrow icon switches from To the Right 
to
Down
.
2. To hide the subordinate data of an entry in the first column, select the entry.
The direction
of the arrow icon switches from Down to
To the
Right .