Drag
resize
rotate
设计面板(Designer Canvas ：variable size, scrollable)
缩略图（Zoombox）
框线选择（Rubberband selection）
Toolbox (drag & drop)
Connecting items
Open, Save
Cut, Copy, Paste, Delete
Group, Ungroup
Align (Left, Right, Top, Bottom, Centered horizontal, Centered vertical)
Distribute (horizontal, vertical)
Order (Bring forward, Bring to top, Send backward, Send to back)