One of the newly implemented functions of CATIA Compsoer R2016x is Milestone. Each Milestone can be placed anywhere in the Marker field from the right-click menu, so that you can define a specific frame of an animation sequence to be captured and created as an raster image.
Inside the High Resolution Image workshop, you can turn on the Milestones checkbox in order to generate multiple images corresponding to defined Milestones with one batch execution. This should be convenient to generate raster images directly from animation frames, regardless of Marker locations.
Markers are useful to define animation sequences in order to show steps of assembly or maintenance works. And we do have a function inside the High Resolution Image workshop to generate raster images from markers, so that we can create raster images corresponding to the beginning or ending point of an animation sequence. However, there have been no easy way of generating images somewhere between the beginning and the ending frames of an animation sequence. So, this is the motivation of implementing the new Milestone function in which we can take a snapshot image directly from animation definitions regardless of Marker points, so that such images can be used for work instructions or published documents.