[Chimera-users] How to set volume view step size in "vop morph" command

I want create a morph volume between 2 maps (#0, and #1), as a command I wrote:vop morph #0,1 step 1 playStep 0.04 frames 200 step 1 However, the new model #4 morph was display in step "8", not step "1" in the volume view window. How to set the step size in the vop morph command? Thanks!