Relative position (default alignment method)
The position of a box in its default state is defined relative to other boxes according to the orientation, alignment, and distribution rules.
Fixed position
If you select a box placed just below the base box and set the Style Bar's "Position" to "Fixed", the box will be fixed to the screen.
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Absolute position
If you select a box with a parent box and set the "Position" in the Style Bar to "Absolute Position", the box will be placed in an absolute position relative to the nearest edge of the parent box.