I will draw some ideas in my sketchbook and then draw them on a big canvas.
 Rough sketches
First, I draw some rough thumbnails sized around 2 x 3 cm in my sketchbook.
What kind of themes should I use? How about the composition? I draw some ideas in a short timeframe to get an idea of the overall image.
This time, I wanted to draw a “bottled salad”.
I think that the bright colors of different vegetables packed in a bottle looks very cute, so I decided to use that theme for this illustration.
I narrowed down my ideas to these two.
I’ll draw these rough ideas on the actual canvas size to see the overall balance.
This time, I want to draw a landscape illustration, so I make the canvas landscape from the [Edit] menu > [Rotate/Invert canvas] > [Rotate by 90 Degrees Clockwise].
 Checking the rough draft
I select “Layer 1” from the [Layer] palette and change the name to “Rough draft 1”.
I select the “My Pens” > “Darker pencil 2” brush. To start, I choose a large brush size (about 50-80 pixels) and set opacity to approximately 100%, then draw roughly.
I imagine vegetables popping out of a bottle like a “vegetable gun”.
I draw the other idea on a different layer.
I click the eyeball icon on the “Rough 1” layer and hide it. Then I create a [New Layer] above it, change the name to “Rough 2” and draw my rough draft like before.
The finished rough sketch is below.
I imagined the forest animals making a bottled salad in the forest.
When I actually drew the sketches on the canvas, I concluded that the second one was more like a picture book, which I preferred more. Therefore, I will go forward with the second rough draft.
I may use the first rough idea in a different situation, so I save it as a separate file.