If you want to redesign the interface of Sudoku1, some functions are available:
- Selection of display for Text, Cell and Grid in Preferences
- Geometry of the grid in Preferences
- Background changed in Preferences
- Colors of different objects of Sudoku1

It is possible to add grids in the catalog, by putting grids in the directory 'SudGrid', and then updating the file GridList.dat.

The definition of Irregular Grids can also be amended by adding, for the different size of Matrix, the definition of block created on the screen.  You have to update the file IRGBlk.dat, or to use specific debug key (CTRL W).

Animated images can be added. Create a file "*.ani" and a directory in the same place than executable, then add 16 gif images in this directory. See the example of "Nature.ani."

In addition, some images used by Sudku to display the dialog boxes or icons can be changed in the core directory:
- Artist1: Background for panel Init
- Artist: Background for panels Generation, catalogue, Bravo, Score, Preference, Magic, Method
- Shuffle: Icon bar used to mix animated images
- Undo: Icon bar used to undo the last action
 
The directories are:
- Background: background images
- Animal / Nature / Vehicles: Images Animated
- MagicPref: Definition of standard Sudoku1display files
- MyGrid: Your grids
- SudGrid: Grids Catalogue
- TextGrid: grids in text mode

Search is carried out with a Time-out, that is adjustable in the register. If you want a specific hard value, close your program. Run regedit. Search TIMEOVER. Amend to accelerate and improve research or generate (depending on the power of your PC). You can also use the key SHIFT + 8 (with magic code) and preference panel.