129 lines
5.1 KiB
Markdown
129 lines
5.1 KiB
Markdown
# bcat's Corne layout
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This is my favorite split ergo layout for typing, featuring the traditional
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four ortho/ergo layers (Default, Lower, Raise, Adjust). It is loosely inspired
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by the default Planck (numbers on Lower, symbols on Raise) and Crkbd (Space on
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left, Enter on right) layouts, but has since been redesigned heavily according
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to the principles described below.
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* Since my most-frequently-used keyboard shortcuts involve Ctrl, which lives on
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the left half of the keyboard, keys frequently used with it (numbers, function
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keys, etc.) are on the Raise layer activated by the right thumb.
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* Navigation can be done on the right half alone, to enable simultaneous
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left-handed mousing. Additionally, Web pages can be scrolled with Space or
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Shift+Space on the left half alone, to enable taking notes with the right hand
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at the same time.
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* Other than Right Shift (which I seldom use), mods aren't rebound on layers.
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* Likewise, Backspace is not rebound on layers to avoid having to let go of
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layer-switch keys to correct mistakes.
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## Default layer
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([KLE](http://www.keyboard-layout-editor.com/#/gists/08d9827d916662a9414f48805aa895a5))
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* The alpha keys are a standard QWERTY layout, no funny business there.
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* Tab and Backspace are in familiar locations from my row-staggered boards
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(almost all of which use HHKB-style split backspace).
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* The Esc key is next to the home row for convenience in Vim.
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* Likewise, the Ctrl key is in the same place as on my row-staggered boards
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(where I've been remapping Caps Lock as Ctrl since before even using QMK).
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* There are two Shift keys, although I generally use Left Shift. (I've
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considered replacing Right Shift with another key, but haven't chosen one.)
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* Lower and Raise layer-switch keys are in the resting position of my left and
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right thumbs, respectively.
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* Space and Enter are on the big thumb keys so they're easy to press.
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* Ctrl is on the left for ease of chording, especially one-handed use of common
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shortcuts like Ctrl+T and Ctrl+W. This puts Alt on the right by the process of
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elimination.
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## Lower layer
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([KLE](http://www.keyboard-layout-editor.com/#/gists/c3fba5eaa2cd70fdfbdbc0f9e34d3bc0))
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* This could also be called the "symbol layer".
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* Shifted numbers are bound in their usual positions on the top row.
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* Hyphen/Underscore and Equals/Plus are in the right index- and middle-finger
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columns for easy reach. They share the same relative position as on a
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row-staggered keyboard, and the shifted versions are physically above the
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unshifted versions as a mnemonic device.
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* Brackets and braces are placed below the parens for easy recall. Once again,
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the shifted versions are on the home row and the unshifted versions are on the
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bottom row.
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* Forward Slash/Pipe and Backtick/Tilde fill out the remaining positions on the
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right half, with the same relative positions as on a row-staggered HHKB layout.
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And yup, the shifted versions are above the unshifted versions.
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* Remaining keys from a TKL are placed out of the way on the bottom row of the
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left half.
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* The home row on the left half contains handy shortcuts for zooming and browser
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navigation.
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* Lower+Esc is bound to Ctrl+Space because the Ctrl and Space keys are both on
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the left thumb, so this key combination (which I use for tmux prefix and editor
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autocomplete) is hard to press in its natural location.
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* Lower+Tab is bound to a custom Alt+Tab macro that keeps the Alt modifier held
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as long as the Lower key is held down. This means that window switching is on
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Lower+Tab immediately next to browser tab switching (Ctrl+Tab).
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## Raise layer
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([KLE](http://www.keyboard-layout-editor.com/#/gists/08b44355d4ca85d294bad9e2821f91d7))
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* This could also be called the "number layer".
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* Unshifted numbers are bound in their usual positions on the top row.
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* Arrow keys are on VIM-style HJKL keys.
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* Home/End and Page Up/Page Down are in the same column as the arrow keys, but
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translated down one row. (This means that the comma and period keys are not
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bound on the number layer, which makes data entry a bit funky. I might add a
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dedicated numpad layer to compensate.)
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* Function keys F1–F10 take up most of remaining space on the left half, with
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F11 and F12 spilling over to the right half. (This puts the most used function
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keys (F1–F5) on the home row.)
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* Insert and Delete are on the rightmost column, because there didn't seem to
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be a better place to put them.
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* Caps Lock is bound in the same position as on an HHKB, for lack of an obvious
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better location.
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## Adjust layer
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([KLE](http://www.keyboard-layout-editor.com/#/gists/77e7572e077b36a23eb2086017e16fee))
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* Media keys are centered around the ESDF cluster, just like I arrange them on
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row-staggered keyboards. (It's even more sensible with columnar stagger.)
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* The navigation keys are replaced by RGB controls. Again, this mirrors the
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positioning I use on my row-staggered keyboards.
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* Finally, reset keys live at the top-left corner of the right half where it's
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reasonably hard to press them by accident.
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