At this stage you should know what you are going to paint and have your reference photos, pictures or sketches ready to go.
Here are some different methods of transferring a drawing to canvas:
1. Lightly sketch the basic main parts onto your canvas, either free-hand or by tracing the images onto the canvas.
2. Enlarge a photo you have taken yourself using a photo-copier, then trace the image onto your painting surface.
3. Use a grid system to enlarge or reduce the size of your subject. You can draw up a grid onto a large piece of paper and then trace the subject onto it buy using the lines of the grid.
For example, if you have a 10cm x 15cm picture that you want to transfer onto a 25cm x 35cm canvas. Take a photocopy of the picture then draw a 1cm x 1cm grid onto the picture. You would end up with 10 x 1cm squares across and 15 x 1cm squares down. Now you have to transfer those dimensions over to fit the 25cm x 35cm canvas.
Draw a grid onto a large sheet of paper a little bigger that 25cm x 35cm. This time you need to have 10 x 2.5cm across = 25cm and 15 x 2.34cm = 35cm. Next, trace the image onto the grid using the grid as a guide. Lastly, I retrace the new drawing onto a clear sheet of paper without the grid lines.