In the General tabbed pane you can change some of the .war file's
general properties:
Change the name to be displayed by the tree in the WAR Display Name
field.
Add a file or directory to the .war file by clicking Add; Remove
a file or directory from the .war file by selecting it from the Contents
field and clicking Remove.
Edit the description of the .war file in the Description field.
Select Distributable if your web application requires a distributed
environment to function.
Click Mime Mapping to enter the mappings of extensions to MIME types.
In the Session Timeout field, enter a default
interval in minutes
for all sessions in the web application.
Click one of the buttons labelled "..." to select an icon that GUI tools
will use to represent your web application. You can select only GIF or
JPEG files that are either 16x16 or 32x32.