The exporters do not have any way to tell what the "current view" is. What "only-visible" means is to limit the bounds of the PNG to the items that are currently "visible" (i.e. enabled layers/pins/vias/rats) on the board, not on the screen. I.e. it does the equivalent of "autocrop" would in a paint program.
The exporters do not have any way to tell what the "current view" is. What "only-visible" means is to limit the bounds of the PNG to the items that are currently "visible" (i.e. enabled layers/ pins/vias/ rats) on the board, not on the screen. I.e. it does the equivalent of "autocrop" would in a paint program.