# swaynag > Display a message in a bar on top of a screen. > More information: . - Display an error: `swaynag {{[-m|--message]}} "{{error message}}"` - Display a warning: `swaynag {{[-t|--type]}} warning {{[-m|--message]}} "{{warning message}}"` - Display a message with custom settings defined in the config: `swaynag {{[-t|--type]}} {{custom_type}} {{[-m|--message]}} "{{message}}"` - Use the specified font: `swaynag {{[-f|--font]}} "{{monospace bold 9}}" {{[-m|--message]}} "{{error message}}"` - Create a button and run a command in the specified terminal on click: `TERMINAL={{terminal_executable}} swaynag {{[-b|--button]}} "{{button text}}" {{command}} {{[-m|--message]}} "{{error message}}"` - Create a button and run a command on click: `swaynag {{[-B|--button-no-terminal]}} "{{button text}}" {{command}} {{[-m|--message]}} "{{error message}}"` - Display the bar on the bottom of the screen: `swaynag {{[-e|--edge]}} bottom {{[-m|--message]}} "{{error message}}"` - Open `swaynag` on the specified monitor: `swaynag {{[-o|--output]}} {{DP-1}} {{[-m|--message]}} "{{error message}}"`