Menu name

[Flato, Gillian]

Does anyone know what to call the type of menu where you click on the
plus sign and then the plus sign changes to the minus sign and the menu
displays below?
 

Thank you,

 

<mailto:gflato at nanometrics.com> 

Gillian Flato

Technical Writer (Software)

nanometrics

1550 Buckeye Dr. 

Milpitas, CA. 95035

(408.545.6316

7  408.232.5911

* gflato at nanometrics <mailto:gflato at nanometrics.com> .com
<blocked::mailto:v at nanometrics.com>