Glass splashback, how does it work?

I'm thinking about getting glass splashbacks for the new kitchen but there is a window in the middle of the wall that it would cover.

1. Can you get it made as one pane (height would go from about 60cm to 25 cm (at window) then back to 60cm)? This may be impractical if wall is not perfectly straight, consider potential for cracking at corners around the window?
2. If it is made from multiple panes, do you just join them using clear silicone?
3. Do you paint the wall behind, paint the glass or is the glass "tinted" by the supplier?
4. How is it fastened?

:?


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