  Magnetic skyrmions are topologically wound nanoscale textures of spins whose
ambient stability and electrical manipulation in multilayer films have led to
an explosion of research activities. While past efforts focused predominantly
on isolated skyrmions, recently ensembles of chiral spin textures, consisting
of skyrmions and magnetic stripes, were shown to possess rich interactions with
potential for device applications. However, several fundamental aspects of
chiral spin texture phenomenology remain to be elucidated, including their
domain wall structure, thermodynamic stability, and morphological transitions.
Here we unveil the evolution of these textural characteristics on a tunable
multilayer platform - wherein chiral interactions governing spin texture
energetics can be widely varied - using a combination of full-field electron
and soft X-ray microscopies with numerical simulations. With increasing chiral
interactions, we demonstrate the emergence of N\'eel helicity, followed by a
marked reduction in domain compressibility, and finally a transformation in the
skyrmion formation mechanism. Together with an analytical model, these
experiments establish a comprehensive microscopic framework for investigating
and tailoring chiral spin texture character in multilayer films.
