Navigation: Customizing FontCreator > Options >
Options - Import
On the Tools menu, click Options, and then click the Import tab.
These settings are used when vector-based images are imported as well as when contours are copied to the clipboard, so they can be exchanged with vector based image editing software while maintaining scale and position. The preferred values depend on the used document, and can be determined from within your external vector software. Do ensure that you measure the values while units are shown in pixels (px). The height of your image is usually a good value for Pixels per em.
Check the Move imported outlines to origin option if you prefer to always place imported vector based images at position (0,0).