# Sandbox.UI.Menu.Open

## Overload 1

```csharp
void Open(Panel source, PositionMode position, float offset = 0)
```

Show this menu's options next to a panel. Use this for context menus and buttons.

### Parameters

- `source` (`Panel`)
- `position` (`PositionMode`)
- `offset` (`float`), default `0`

## Overload 2

```csharp
void Open()
```

Show this menu's options beside its own row, the way a submenu opens.

Declared in [Sandbox.UI.Menu](/api/Sandbox.UI.Menu).
Assembly: `Sandbox.Engine`.