Customizing Appearance

Updated on Aug 5, 2026

This article describes how to customize the appearance of RadInlineAIAssistant, beyond the standard Background, BorderBrush, BorderThickness, and Padding inherited from Control.

Customizing the Watermark Content

The WatermarkContent property sets the content shown in the prompt input while it is empty, guiding the end user on what to type.

Setting a custom watermark

C#

this.assistant.WatermarkContent = "Ask AI to edit the selected text...";

RadInlineAIAssistant with a Customized Watermark Content

Customizing the Input Area

The InputAreaBorderStyle and InputAreaPadding properties control the border and the inner spacing of the input area that hosts the commands button and the prompt input (see Visual Structure).

Defining a custom input area border style

XAML

<Window.Resources>
    <Style x:Key="CustomInputAreaBorderStyle" TargetType="Border">
        <Setter Property="CornerRadius" Value="12" />
    </Style>
</Window.Resources>

Customizing the input area border and padding

C#

this.assistant.InputAreaBorderStyle = (Style)this.Resources["CustomInputAreaBorderStyle"];
this.assistant.InputAreaPadding = new Thickness(8);

RadInlineAIAssistant with a Customized Input Area

See Also

• Handling Responses
• Visual Structure