

This widget lets you set which point on the object the X/Y position fields are referring to.
There are fields for position (X and Y), and size (W for width, H for height).
The link button controls whether the size varies proportionally, or whether the W and H fields are independent.
The object’s rotation in degrees.
Fields for horizontal and vertical skew values.
You can also adjust the skew graphically by choosing Arrange -> Skew and dragging the object’s handles.
This button opens the Align palette, letting you align and distribute objects.
The button here does the same thing as choosing Window -> Show Align.

Some shapes, such as rectangles or regular polygons, have a settable Corner Radius property.
You can also adjust corner radius by dragging the corner radius handles inside each corner.
A proxy is a view of one symbol variant that’s imported into another. Proxies live update when the variant they are proxying changes.
If you have a proxy selected, you can use the Proxies: popup menu in this inspector pane to choose which variant the proxy targets.
The number of sides on a regular polygon.
For text, you can set the scale of the text object (a separate scale for each of width and height).
If your selected object is a freehand drawing from the Pencil tool, you can use this slider to adjust its smoothness, As well as the visual differences, if you subsequently convert your freehand drawing into a path, then higher smoothness values correspond to fewer Bézier control points.