Make the first-grid y padding asymmetric: the bottom (far end of the n_y scan) can be padded more than the top via daq.auto_raster.grid_padding_fraction_y_ bottom (defaults to grid_padding_fraction_y, so symmetric unless set higher). The top padding still shifts smargon_top_left; the extra bottom padding only grows n_y. Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>