Color legend font sizes are wrong with batch. Here is how to replicate. I am sure it doesn't matter, but I am going to create a slice, with surface with edges.

• Linux, 5.8.0, builtin server.
• Start trace. Take defaults.
• Load disk_out_ref.exo. All variables on. Apply.
• Slice. Z Normal. Hide plane tool. Apply.
• Color by Temp.
• Surface with Edges.
• Now, drag the color legend to the middle, bottom of the view. I want it to be horizontal.
• Save Screenshot.
• Stop trace. Uncomment the ViewSize command. Save somewhere as myTrace.py.
• Rename your screenshot from above to screenshotOriginal.png
• /.../pvbatch /.../myTrace.py

If you compare the screenshot from pvbatch and the original, you will see that the color legend text is different sizes. This is a bug.

This is possibly related to #19816