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