If you press and hold the Ctrl (Windows/Linux) or ⌘ (macOS) key while drawing, your drawing stroke will turn into a closed shape. If you press and hold the Shift and Alt keys before or while drawing, you will draw a straight horizontal or vertical line. If you are using a pressure-sensitive tablet, you can draw over your line to adjust its thickness.
In the Pencil Properties dialog, you can customize the size, smoothing, texture and line ends of your pencil. In the Brush Properties dialog, you can customize the size, shape, texture, feathering and smoothing of your brush. If you want to make changes to your brush or pencil, in the Tool Properties view, click on the arrow button to open the Brush Properties or Pencil Properties dialog. In the Drawing or Camera view, start drawing.For more information on how to create and edit colours, see How to create or edit colour swatches. To select a colour, click on the colour you wish to use in the Colour view.Use the Maximum Size slider to select the desired size for your brush or pencil.In the Presets list of the Tool Properties view, select a brush or pencil preset to use.In the top menu, select Tools > Pencil.In the Tools toolbar, select the Pencil tool.
If you want to try drawing with the Pencil too, do one of the following: