An electron beam tends to slope downwardly as it is deflected horizontally to form a raster in a video display apparatus. The sloping of the beam can cause geometric errors in the raster, for example orthogonality and parallelogram errors. A raster correction circuit (100) substantially offsets the downward slope of the electron beam by modulating a vertical deflection current (I V ) with an induced horizontal-rate raster correction current (I CORR ), thereby substantially eliminating orthogonality and parallelogram errors in the raster. In respective embodiments of an inventive arrangement taught herein, the horizontal-rate raster correction current (I CORR ) is induced in the vertical deflection coils (L V1 , L V2 ) by magnetically coupling a filament pulse waveform (11), a horizontal deflection voltage waveform, or a horizontal deflection current into the vertical deflection coils (L V1 , L V2 ).