It sounds like you're talking about the Hold Time in the Pan & Zoom tool.
If that's the case, click on the button labeled Settings in this workspace. In Settings you can set the Hold Time as well as the Pan Time.
What version Premiere Elements and on what computer operating system is it running?
Be that as it may, are you trying to apply a pan and zoom effect to video or still? There are differences in the Pan and Zoom workflow depending whether video or still source. In the Pan and Zoom workspace, when source is video, there is no functional Hold option.
Please consider and give more details.