File>Save as>pose preset, or click the + at the bottom of the Content plaette (that will be disabled if you are viewing a Poser content folder, and you won't be able to see the saved preset while viewing Poser content folders0. Load the pose by double-clicking the saved preset in the Content palette or by using File>Merge..., with the figure loaded and selected. You can also use the free Poser format exporter to save a Poser-format pose file.