You can change the number of rows that already have blocks at the start-up of each new game by using the spin box. You can start with up to 19 rows pre-filled at the start-up of your game. The default number of pre-filled rows is zero.

You can change the density of the blocks in the pre-filled rows at the start-up of each game. You can choose a density up to 10 blocks. You should first choose how many rows you want pre-filled under Number of Pre-filled Rows. The default density of blocks is three.

You can adjust the level of difficulty you start on. The highest level you can start on is 10, which is the highest level you can play to. The default starting level is one.

Turn the sound effects on and off using this option. If you are playing this game in any area which you share with other people, you should probably select off.

Choose this option if you want to see the next block that is going to fall. This feature helps you plan the placement of your blocks.

Choose if you want the various block configurations to be color coded or randomly colored. If you use the colors to help you identify blocks, random colors will make the game more difficult.

Choose this option if you want the blocks to rotate counterclockwise or not.

If this feature is used a grey image of the block will show you where the block will land. This feature is very useful for beginning players, but experienced players will find it a distraction.

You can change the style of the blocks, including image and size. There are a variety of pre-made styles.

If you drag your favorite image into the Gnometris window it will be used as the background. If you want a solid color as the background drag one in from either the color picker or from nautlilus' Backgrounds and Emblems dialog (the reset item from that dialog also works).