For the current main selected widget, the position and size can be changed by
drag & drop of the whole widget - changes the position.
typing on one of the cursor keys (up, down, left, right) - changes the position by one pixel.
drag & drop on the edges of the widget - changes the size in this direction.
For the alignment of multiple widgets, several options are available:
red dotted lines identify if edges or the middle of widgets are aligned.
in the Style tab, the properties Position / size can be used to manually set position or size parameters on the same value.
The three dot menu of the widget toolbar provides some additional options:
Align to top / left / bottom / right
Apply same width / height
Distribute horizontally / vertically
