Lets you choose another background texture for the puzzle table. If you choose a single color instead of a texture, the button besides the selection box can be used to define this single color.

Controls the appearance of pieces on the puzzle table. If Palapeli is running slowly, or when puzzles take very long to open, you can disable the graphical effects in this category to speed up everything.

Lets you choose how near neighbor pieces must be positioned to each other to snap together. If you move the slider more to the right, pieces will snap together even if they are not so close. This makes the game a bit simpler to handle.