Writer Images/tables match page width?

Any way to make the size of writer images/tables match page width, so that they span the distance of the page margin on one side to the page margin on the other, without having to drag/enter in the numbers manually to resize?
A shortcut, if you will?

Table properties: Automatic alignment, or Relative 100% width for other types of alignment (e.g., Center):

Image properties: relative width with Keep Ratio, and center horizontal position: