How do I toggle common Vim options like spell, wrap, and number with single keystrokes using vim-unimpaired?

Explanation

The vim-unimpaired plugin adds a set of paired bracket mappings, including a powerful family of option toggles. Every toggle follows the pattern yo{letter}, where [o{letter} enables the option and ]o{letter} disables it. These make frequently-toggled settings one-keystroke operations instead of :set commands.

How it works

The yo family (toggle), [o family (enable), and ]o family (disable) cover the most common boolean options:

Example

yon    " toggle line numbers on/off
yow    " toggle soft wrapping
yos    " toggle spell checking
yoh    " toggle search highlighting

Tips

• The [o / ]o variants are useful in mappings or scripts where you want to force a specific state rather than toggle.
• yob toggles between background=light and background=dark, which is handy for switching color scheme variants.
• vim-unimpaired also adds [q/]q for quickfix navigation, [b/]b for buffer cycling, [l/]l for location list, and many more bracket pairs — see :help unimpaired.