title: How to use format-specific options in ImageMagick?
body: <p>Currently I'm trying to convert to HEIF, but the only HEIF-related option is heic:preserve-orientation (in CLI option <a href="https://imagemagick.org/script/command-line-options.php#define" rel="nofollow noreferrer">define</a>). How can I use other format-specific settings like quality, lossless mode,... for HEIF and other formats? Thanks!</p>
  
  <p>Edit:
  For my case, I use <code>-define heif:quality=x</code> which gives no difference whatever <code>x</code> is.</p>