It is based on the same interfaces like Delphi form designer
You can edit forms, data modules, reports, controls on you form
Full Unicode support.
Undo, Redo operations.
Design Surface - container for designed forms.
Im-place text editing - original feature which provides ability of editing text captions directly on control. This makes designing process more comfortable.
Object inspector looks and works like Delphi's one and now has BDS style with support of property categories, gutter, references, Unicode properties edit...
State images - special interface to add images to property edit control at the left side.
Easy integration with 3D-party Scripters
Other features
Support custom modules
Support property and component editors
Collection, picture, string, dataset fields, actions and other editors are available
"Object Inspector Properties" dialog.
Cross modules references (object and method)
Event properties editing
Runtime package loading
Palette panel for selecting Class to insert
Palette tab control like Delphi one
Alignment palette
Align, Size, Scale, Tab Order, Creation Order dialogs
Designer hints
Clipboard operations compatible with Delphi (you can copy components to/ from Delphi)