The "Transform" panel shows all the geometric properties of a graphic element: position, rotation, size.
Each transformation applied, by changing the values of the properties, starts from the handle selected in the box (placed at the top center of the panel), which represents a fixed point of the selected element in the page.
Together with the geometric properties, there are also fields that allow moving and scaling the selected elements in a relative way.
The button with the "chain" icon allows you to constrain the height and width ratio.
If you activate the chain button, changing the height value will also change the width proportionally; conversely, by changing the width you will set the height in proportion to the width.
There are also buttons to mirror a graphic element both horizontally and vertically.