# Style and Interactivity
## Content
### **OverflowDropDownStyle Behavior**
When the Toolstrip has limited space:
* Tools that do not fit automatically move into an overflow menu.
* The overflow dropdown appearance can be customized using the OverflowDropDownStyle property
**Example: OverflowDropDownStyle Customization**
```auto
OverflowDropDownStyle="@("background: green !important; padding: 12px !important; border: 3px solid red !important;")"
```
**Result:**
* The overflow dropdown now has a green background, 12px padding, and a 3px red border.
* The **!important** keyword ensures the style overrides any other theme settings.
### Visual Properties for Styling Overflow Container
Customize various visual properties:
| Property | Description |
| -------- | ----------- |
| color | Text/icon color |
| border | Border style, thickness, and color |
| border-radius | Rounded corners |
| padding | Inner spacing |
| margin | Outer spacing |
| box-shadow | Drop shadow |
### **Keyboard Navigation**
| Key | Behavior | Applies To |
| --- | -------- | ---------- |
| **Left Arrow / Right Arrow** | Moves focus between tools in a horizontal ToolStrip. | All tool types in horizontal ToolStrip layouts. |
| **Up Arrow / Down Arrow** | Moves focus between tools in a vertical ToolStrip, and between menu items in dropdowns and menus. | Vertical ToolStrip layouts, C1MenuTool, C1DropDownTool, and nested menus. |
| **Enter** | Activates the focused tool. Opens dropdowns and menu panels. | C1MenuTool, C1DropDownTool, C1SelectTool, C1ButtonTool, C1ToggleButtonTool. |
| **Spacebar** | Activates buttons and toggles. Opens dropdowns and submenus. | C1ButtonTool, C1ToggleButtonTool, C1MenuTool, C1DropDownTool. |
| **Escape** | Closes the active dropdown or submenu and returns focus to the originating tool. | C1MenuTool, C1DropDownTool, C1SelectTool, nested menus. |
### **Focus Management**
Focus is managed automatically in accordance with ARIA toolbar guidelines:
* Focus remains within the ToolStrip when navigating with arrow keys.
* When a dropdown expands, focus moves to the first interactive element within the dropdown.
* Closing a dropdown returns focus to the originating tool in the ToolStrip.
* Menu popups support sequential keyboard traversal for nested menus.