# Manage Properties

Intended audience: administrators, developers

## Creating a Property

Go in the device tree and select the Properties node, then click on the “New property” button. This will prompt an input dialog where you can enter the property name.

Tip

Since cppTango 9.3.3, you can use the keywords NaN, -NaN, inf, -inf and +inf when writing double or float scalar and array properties from jive to represent Not A Number and infinite values.
This might not work (yet) for a Java device server.
It is not case sensitive, so nan, -NAN, nAn, iNF, -Inf and +INF are also supported for instance.
A negative NaN is extracted as NaN.

## Rename a Property

Rigth click on the property name in the property table and select “Rename”, This will allow you to give a new name to your property.

## Delete a Property

You can select “Delete” (right click on the property item) to remove one propery. You can also right click on the device node and select “Delete”. This will erase all properties (including attribute properties) for the device. Note that if you want to remove the device itself, you have to remove it from its class in the server definition.

## History of a Property

You can access to the change history of a property by selecting “View History”. This opens the history dialog.

Tango Database History dialog