Inspired by Ono-Sendai Matrix 83
- Return/Enter: So that the number cluster has an enter right next to a tab for data entry.
- . (i.e., period) So that there is a decimal in the number cluster.
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_: This looks like it wants an underscore somewhere easily accessible on the top layer for writing code. But maybe that should just be a Shift+Space?
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[]{}: square and curly braces. Maybe put them in a layer of the number cluster?
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`~: Tilde/backtick is also missing on the top layer. Not sure I care about that.