Howard, I'm no imaging guru, but here's what I do. Registax works like Turbo Tax - a series of guided steps in organized in a left-to-right sequence of tabs. The following assumes you want to do some basic processing of planetary images without dark or white flating calibration. 1. The Align through Stack tabs These will work fairly automatically. One major problem with the stack feature is that if you have been capturing with a planetary web camera and have a couple of hundred images, Registax may missort the image names. This causes the images to jump during the registration process - and misregister resulting in a blurry image. By only including images with the same name format, e.g. "Myimage_100, Myimage_101, Myimage_102" but not "Myimage_1, Myimage_2, Myimage_3", Registax will properly sort the names. You can force the sort using an option. On the align tab, there is an option check box for "Show frame list". This option will show the images in the frame list and allow you to force the proper sort order - e.g. - the order that the images were taken. Multiple alignment points are preferred over single point alignments. For Saturn that might be the tips of either side of the rings. 2. The Stack tab There is a key option the stack tab for planetary-lunar as opposed to deep sky imaging. The "normalize intensity over frames" checkbox, if checked, will average the intensity of the images when stacking. This option is used for planetary imaging. If the "normalize intensity over frames" checkbox is not checked, the images will sum-stack. This is used for deep sky imaging. 3. The Wavelet tab On the left hand column you have the Wavelet filter. Sliding the 6 sliders to the right will crispen the image. You have experiment with these to see what works best with each image. It's a trial and error learning curve. Basically, I try each wavelet layer control in turn, running through no. 1 through no. 6. If the control doesn't do anything for the image, slide it back to it's default value of 1.0. Slide each control slightly to the right to best crispen in the image. Continue moving each control to the right in turn until the image starts to look overprocessed. It's an artistic preference. If you make an error on setting the wavelets, I have not found a way to reset the tab. Usually, I have to exit the program and restart from scratch. If one wavelet slider control setting is messed up, you can use the checkbox next to the slider to deactivate it. In the upper right hand corner of the Wavelet tab, there are a group of buttons to adjust the brightness and contrast of the image. I find the "Tonemap" and the "Gamma" to be the most useful. Click on the line on the graph and then drag the red circle dot around to taste. On the "Tonemap" option dialogue there also is an "activate" check box that needs to be checked to use the control. If you mess up on the gamma correction or contrast, there are reset buttons on each of the tool windows. 4. The Final tab The Final tab let's you crop, rotate and export the image. For saving the image, I usually export bmp, jpg, tiff, png and fits. Then I can tweak the image in other imaging processing software as needed. Hope that helps. - Kurt P.S. - For whatever reason, all the save as crop and rotate options on the Final tab do not work on my Windows XP. So, I usually have to do some cropping or rotating in other programs.