The vertical screen coordinate of the bottom of the stimulus.
<button> <clock> <picture> <shape> <text> <video>
This property returns the bottom of the stimulus in screen pixels.
The following displays the value of bottom in a text stimulus:
<text sometext>
/ items= ("bottom = <% text.foo.bottom %>")
</text>
The following displays the value of bottom in an instruction page:
<page somepage>
bottom = <% defaults.bottom %>
</page>