Change to a white canvas.(from a checkered pattern)

The default background setting is transparent (a checkered pattern).

If you keep zooming in the display, you will see the grid lines.

You may prefer a white canvas instead.

Then..

Make a transparent background (a checkered pattern) to a white background.

Go to "View" in the menu bar, and uncheck "Transparent Background"( 1 ).

Once "Transparent Background" is unchecked, "Background Color" option is available to select. If you specify a color, it will become the background color.。

Remove the grid lines at zoomed display

Go to "View" in the menu bar, and uncheck "Pixel Grid"( 2 ).

Now, let's draw in a canvas with your preferred background color!