  Bipartite graphs model the relationship between two disjoint sets of objects.
They have a wide range of applications and are often visualized as a 2-layered
drawing, where each set of objects is visualized as a set of vertices (points)
on one of the two parallel horizontal lines and the relationships are
represented by edges (simple curves) between the two lines connecting the
corresponding vertices. One of the common objectives in such drawings is to
minimize the number of crossings this, however, is computationally expensive
and may still result in drawings with so many crossings that they affect the
readability of the drawing. We consider a recent approach to remove crossings
in such visualizations by splitting vertices, where the goal is to find the
minimum number of vertices to be split to obtain a planar drawing. We show that
determining whether a planar drawing exists after splitting at most $k$
vertices is fixed parameter tractable in $k$.
