  We aim to explore the actions of the new Gaia DR3 astrometry to find
structures in the Galactic disc. We compute the actions and the orbital
parameters of the Gaia DR3 stars with full astrometry and velocities assuming
an axisymmetric model for the Milky Way. Using Gaia DR3 photometric data, we
select a subset of giants stars with better astrometry as control sample. The
maps of the percentiles of the radial action J_R reveal spiral-like shape
structures. We find a high J_R region centered at R~10.5 kpc of 1 kpc width, as
well as three arc-shape regions dominated by circular orbits at inner radii. We
also identify the spiral arms in the overdensities of the giant population. We
find a good agreement with the literature in the innermost region for the
Scutum-Sagittarius spiral arms. At larger radii, the low J_R structure tracks
the Local arm at negative X, while for the Perseus arm the agreement is
restricted to the X<2 kpc region, with a displacement with respect to the
literature at more negative longitudes. We detect a high J_R area at a
Galactocentric radii of ~10.5 kpc, consistent with some estimations of the
Outer Lindblad Resonance location. We conclude that the pattern in the dynamics
of the old stars is consistent in several places with spatial distribution of
the spiral arms traced by young populations, with small potential contributions
from the moving groups.
