1.1 Starting Flymake

To use Flymake, activate the minor-mode flymake-mode. Use the command flymake-mode to toggle it on and off. The mode line should indicate its presence via an indicator (see Mode line status).

Syntax checks happen “on-the-fly”. Each check is started whenever:

If the check detected errors or warnings, the respective buffer regions are highlighted. See Finding diagnostics, for how to learn what the problems are.