Hi, I've originally tried a knob thingy instead of the slider. Knobs are used very frequently in the real world to tune or adjust stuff. But the knob makes for a horrible silhouette, even at 64x64. That's when I went with the slider, at least it as more recognizable. Personally, I like the analogy with the spanner. It is a tool to tighten or adjust screws, in order to get "something" (most likely a machine, an engine, a bicylce) into perfect working condition. This association should be fairly common among different cultures. A red checkmark was used to indicate correct answers during my schooltime btw. With most settings apps, you don't "check" options, but you adjust some property. Tracker has a couple of on/off option type preferences, but most other settings are like "mouse acceleration", "screen resolution", "keyboard repeat delay", "the type of something" etc. I'm just saying a checkmark is not *the* perfect symbol for making adjustments to your computer settings, IMHO. So far, I like the spanner best out of all options: [ ] Checkmark [ ] Slider [V] Spanner [ ] Skewdriver :-) Best regards, -Stephan