[sciurius]

In your case it is not global settings that inadvertently were copied to the target device, but the fact that every song has the actual text display settings included in its individual metadata.

You can manually adjust one song to the right settings, and then apply this setting to all songs (there's a button for that).
But you would need to repeat this every time new songs are imported.

I don't know if this can be addressed with a simple "scale everything by ..." since it involves the subtilities of line and page breaking.