Style and Interactivity

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

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.

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

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 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.