```coffeescript
# Keybindings require three things to be fully defined: A selector that is
# matched against the focused element, the keystroke and the command to
# execute.
#
# Below is a basic keybinding which registers on all platforms by applying to
# the root workspace element.

# For more detailed documentation see
# https://atom.io/docs/latest/behind-atom-keymaps-in-depth
'atom-workspace':
  'ctrl-cmd-a': 'simple-align:align'
```

Add keymaps supported by Linux and Windows
user
```coffeescript
# Keybindings require three things to be fully defined: A selector that is
# matched against the focused element, the keystroke and the command to
# execute.
#
# Below is a basic keybinding which registers on all platforms by applying to
# the root workspace element.

# For more detailed documentation see
# https://atom.io/docs/latest/behind-atom-keymaps-in-depth
'.platform-darwin':
  'ctrl-cmd-a': 'simple-align:align'

'.platform-win32, .platform-linux':
  'ctrl-alt-a': 'simple-align:align'
```
assistant