Once you have completed setting up your Stackup and optionally specified a drill file and/or selected a section of your metal layers to translate, click on this button to execute the import. If this is the first time you have performed this multi-layer import, you will be prompted to save your settings to a job file (. njb) which may be used in subsequent imports so that you do not have to re-create your setup each time you makes changes in your Gerber source files. A progress window is displayed while the files are being imported. When the translation is complete, control is returned to the Import window in the project editor.