The top two items on the Macro menu should be Do Stack and Do Average and Filter. If you do not see these, or you know they have been altered, then click on Restore Original Defaults.
Load frames into CombineZ using:
File->New - File menu New item
Note you can select several files at once if they are all in the same folder. Browse through the loaded files with the 'Up' and 'Down' Arrow Keys. The frame you are looking at is called the Active Frame.
Process the Stack to produce a Picture by using:
Macro->Do Stack
Then save the result using:
File->Save Rectangle As
It's that simple in a lot of cases. Notice that the picture and the original frames look a little strange around the edges. CZ has added a border to make processing the picture easier and quicker for itself. Press 'A' repeatedly and see which of the different sized rectangles that it shows are suitable for saving.
The output from this process is called the Picture. To switch from a view of the Active Frame to the Picture and back, use the 'Tab' key. A further enhanced version of the Picture is stored in a location called Out, you can display this by pressing 'O' this key has a toggle action too.
This is almost as easy to use as the above, once your frames are loaded
Macro->Do Average and Filter
If you have large pictures you may have a short wait while the DFT routines are initialized and the initial calculations done. You will be presented with a picture this time stored in a location called 'Out'. This picture will probably be either blurred or too sharp. Press the letter 'V' and a small dialog will appear. Notice the number in it. If your picture is too sharp, increase this number; if it is blurred then decrease it. Then click OK or press Return Once. You can repeat the above as many times as necessary. If you press Return a further time the Sharpening process is finished.
With smaller pictures, where the wait for a result between trials is short, it is convenient to use the following keys to find the best result. The Left and Right Arrow keys alter the sharpness in small steps. 'M' and 'N' do the same in larger steps. You could use 'V' to get close, then use these keys to fine tune the result. Try not to oversharpen the result. Remember you will probably need to alter the Contrast later.
Again save the result as described above.