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There's no set pattern for this, which is down to the fact that they're not a native control, unlike checkboxes. Each application is able to define and design its own sliders. As far as I can tell,...
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#1: Initial revision
There's no set pattern for this, which is down to the fact that they're not a native control, unlike checkboxes. Each application is able to define and design its own sliders. As far as I can tell, the _general convention_ is to read left to right; that is, a slider currently set to its rightmost position is to be read as ON (whatever that means in the context of the application). As you said, some sliders will attempt to indicate state changes with text or icons. As far as I can tell, the general convention there is that the displayed text or icon indicates _current state_ — so if a tick or the text ON is displayed, the slider should be read as currently ON. These are just conventions in usage as far as I can tell. There's nothing to stop an application designing its sliders completely differently.