Size of First Slide (or as below)

   Optional ImageMagick switches ... Convert to JPEG Convert to PNG Convert to GIF Convert to BMP Convert to PDF Vignette 50% Vignette 60% Vignette 70% Vignette 80% Vignette 90% Flop Flip Rotate 180 Rotate 90 Rotate 270 Shear Convert to JPEG Quality 90% Convert to JPEG Quality 80% Convert to JPEG Quality 70% Convert to JPEG Quality 60% Convert to JPEG Quality 50% Convert to JPEG Quality 40% Convert to JPEG Quality 30% Convert to JPEG Quality 20% Convert to JPEG Quality 10%   Optional GD filters++ ... Grayscale Negate Emboss Edge Detect Brightness Contrast Smooth Colourize Pixelate Scatter Mean Removal Selective Blur Gaussian Blur Crop Default Crop Transparent Crop Black Crop White Crop Sides Crop Threshold Scale Rotate Copy Merge Copy Resized Fill