# helix > Helix, A post-modern text editor, provides several modes for different kinds of text manipulation. > Pressing `i` enters insert mode. `` enters normal mode, which enables the use of Helix commands. > More information: . - Open a file: `helix {{path/to/file}}` - Change the Helix theme: `:theme {{theme_name}}` - Save and Quit: `:wq` - Force-quit without saving: `:q!` - Undo the last operation: `u` - Search for a pattern in the file (press `n`/`N` to go to next/previous match): `/{{search_pattern}}` - Format the file: `:format`