======Свойство Transition.Underlay======
  * **Пространство имен:** [[developers:references:topomatic.alg.prf|Topomatic.Alg.Prf]]
  * **Сборка:** Topomatic.Alg (в Topomatic.Alg.dll)
=====Синтаксис=====
<code csharp>public Drawing Underlay { get; set; }</code>
**Значение свойства**
  * Тип: [[developers:references:topomatic.dwg.drawing|Topomatic.Dwg.Drawing]]