The JS9 display has a default width and height of 512x512. You can change this by adding data-width and data-height attributes to the divs. For example, to create a display of size 256x256, use:
<div class="JS9" data-width="256px" data-height="256px">
The data-width and data-height attributes can be
applied to other JS9 divs, such as the menubar. For smaller menubars,
make sure you specify a height value as well:
<div class="JS9Menubar" id="JS9-256_Menubar" data-width="256px" data-height="54px">
JS9 Demos: