  I review the characteristics of high redshift galaxies, with particular
attention to the effects of dust obscuration on the observed light. Galaxies at
redshift z~1 and at z>2 are discussed separately, as the accessible information
for each redshift range are different. In the z<=1-2 redshift region, data on
the H-alpha and mid/far-IR luminosity of the galaxies are becoming increasingly
available, effectively complementing the restframe UV data; they offer a better
handle on the amount of dust obscuration present in the galaxies, although some
ambiguity remains as to the distribution of the dust within the system and the
opacity correction factor this implies. At higher redshifts, most of the
available data cover the far-UV region only, representing a challenge for a
careful assessment of the effects of dust in galaxies. Finally, I discuss the
implications of the dust corrections to the star formation rate density of the
Universe as a function of redshift.
