By default, for all HTML and XML outputs except JavaHelp, DITA2Go adds a px suffix to width and height attribute values for images sized in pixels. For example:
<img border="0" src="topview.gif" width="312px" height="203px">
However, a px suffix causes the JavaHelp viewer to show an image as a thumbnail; so for JavaHelp, the default is to omit the suffix. You can direct DITA2Go to omit the px suffix for other output types.
To omit the px suffix from image width and height attribute values:
[Graphics] ; UsePxSuffix = Yes (default except for JavaHelp, include "px" in the ; width and height attributes), or No (JavaHelp default) UsePxSuffix = No
For DITA XML output, it is usually best to include the px suffix.