The Transformations window is accessible through main menu under Transform / Transformations Window.
Controls on the first tab do operations that are available also in an interactive form in the work area or Object Inspector: movement, rotation, skewing, resizing and change of objects order. Rotation uses center (reference) point that can be moved in the work area with mouse cursor.
Please note: if Apply Rotation to Fill Stitches option in the main menu > Transform is checked, stitches angle is adjusted when object is rotated.
The second tab is objects Alignment Tab. Alignment works with two or more selected objects.
Three vertical controls align selected objects to top,
center and bottom of the whole selection.
Three horizontal controls align selected objects to left side,
center and right side of the whole selection.
Objects from above example aligned to upper edge.
The third tab is Distribution Tab. Distribution works with three or more selected objects.
Three vertical controls distribute objects in vertical
direction so that tops, centers or bottom
of objects are equally spaced within selection.
Three horizontal controls distribute objects in horizontal
direction so that left sides, centers or right
sides of objects are equally spaced within selection.
Remaining two controls distribute objects in vertical and horizontal directions so that there are equal spaces between objects.
Objects from above example equally spaced with respect to the upper edge.
Please note: It is possible to combine various operations while Transformation window is open. For example, you can scale selected objects, align them according to upper edge and space them equally in the horizontal direction.