The dialog for exporting graphs can be launched using the File:Export Graphs menu item. This dialog offers a preview, as well as the ability to select output file format, output size, resolution (DPI) in case of raster images, and other controls for customizing your export. Once you have set desired values for various parameters, your settings can be saved as a theme file for future use. You should know the format required (such as PDF, EPS, TIFF etc), the image dimensions, the resolution/DPI (in the case of raster images such as TIFF), and font size requirements. The graph export dialog defaults to allowing you to change width, and height is scaled automatically to maintain aspect ratio. You can choose Height Rescaling and do the reverse. If you need to change both, before opening the export dialog, go to your graph and open Plot Details (Format: Page). You can then set the page dimensions at the Graph node level by accessing the Print/Dimensions tab. If a particular font size was specified, such as say minimum font size of 6 pt then open Format: Layer to the Display tab and check Fixed Factor and set the value to 1. Repeat this setting for each Layer. This ensures that any layer you may have re-sized is not scaling fonts. Set all font sizes to meet the requirements. For raster file formats such as TIFF and JPEG, the graph export dialog will have a DPI Resolution control located under the Image Settings node. Use this control to set DPI. Note that publishers often specify DPI and not the image size. While this is fine for Vector formats, Raster formats require physical dimensions and DPI to determine Pixel Size. If you left the page width as default value such as 10.7 inches, and set the DPI to a large number such as 1200, you can end up with a very large export file size that may cause system resource issues, plus your publisher is not going to be happy to receive a very large file with more pixels than really necessary. The Pixel Size of a Raster format is determined by physical size and DPI and is shown in the export dialog. Vector image formats can resize to fill any size container. Raster image formats are rendered into physical containers based on DPI and dimensions. For high resolution devices – such as printers – 1000 pixels (width or height) rendered at 1200 DPI will result in a physical size of 0.833 inches ( 1000 / 1200 ), while low resolution devices – such as your computer screen – will render that same 1000 pixels as about 10 inches in size (assuming a screen DPI of 100 : 1000 / 100). Source.