lire en diagonale bedeutet auf Englisch

skim [skimmed, skimming, skims]▼◼◼◼(read quickly, skipping some detail)
verb
[UK: skɪm] [US: ˈskɪm]

skim through▼(to read something hurriedly without being attached to details)
verb
[UK: skɪm θruː ˈsʌm.θɪŋ] [US: ˈskɪm θruː ˈsʌm.θɪŋ]