Image Editor
Top
Select the value next to the px. Editing this value changes the height the content is from the top of the editor.
Left
Select the value next to the px. Editing this value changes the height the content is from the left side of the editor.
Width
Select the value next to the px. Editing this value changes the width of the selected content.
Height
Select the value next to the px. Editing this value changes the height of the selected content.