Sizing
Set the AllowResize property to true
to display a size grip element that allows users to resize an ASPxHtmlEditor.
<dx:ASPxHtmlEditor ID="HtmlEditor" runat="server">
<SettingsResize AllowResize="true" />
</dx:ASPxHtmlEditor>
Use the SettingsResize property to access settings that limit the HTML Editor’s size:
The editor’s actual size is preserved in the client state and restored after each round trip to the server (postback or callback).