Click the "Load Key" button. This button lets you select any area on the screen and copy it. You need to copy the image of the key – the set of elements that can appear in the puzzle. Try to get all the shapes inside the key within the selected area. Avoid selecting unnecessary elements like letters, numbers, or lines separating the key from other parts of the image.

    Click the "Recognize key" button. The program will automatically recognize the key. If any key elements are recognized incorrectly, you can click on that element and choose a different one from the list. If the element isn't in the list, replace it with any other element and just use the same replacement in the main grid later. If the program can't recognize the key, it will offer you to create it manually. You'll need to choose the number of key elements and then fill each element with a shape. The order of the shapes doesn't matter.

    Click the "Confirm key" button to save the key.

    Click the "Load grid" button and copy the square puzzle area from the screen, just like you copied the key area before. 

    Click the "Recognize grid" button. The program will automatically recognize the grid. If there are any errors, you can edit the grid. You can only choose shapes that are already in the key. You can add and remove rows and columns.