What You Need to Draw on a Computer

You can draw on a computer using a mouse, a touchpad, or a stylus and tablet. A mouse works but feels awkward for detailed drawing—your hand moves in one place while the cursor moves on screen, which takes practice. A touchpad on a laptop lets you draw directly where your finger is, but the small surface limits precision. A graphics tablet (also called a pen tablet or drawing tablet) is the most natural option: you draw on the tablet's surface with a stylus, and the image appears on your monitor, just like drawing on paper.

You also need drawing software. Free options include GIMP (works on Windows, Mac, and Linux), Krita (also free and cross-platform), and Photoshop's free trial (30 days). Paid software like Photoshop, Clip Studio Paint, or Procreate (iPad only) offers more brushes and features, but beginners can create finished work with free tools. Start with what you have—a mouse and free software—before spending money on a tablet.

Key Takeaways

  • A graphics tablet with a stylus feels most like drawing on paper, but a mouse or touchpad works while you learn the software.
  • Free drawing programs like GIMP and Krita have all the core tools you need: brushes, layers, color selection, and undo.
  • Layers let you draw on separate transparent sheets stacked on top of each other, so you can erase or change one layer without affecting others.
  • Pressure sensitivity on a stylus makes lines thicker when you press harder, which requires a graphics tablet—a mouse cannot detect pressure.
  • Most drawing software saves in its own format by default; export to PNG or JPG when you want to share your finished work.

Opening and Setting Up a New Drawing File

Launch your drawing software and create a new file. In GIMP, go to File > New. In Krita, go to File > New Document. You will see a dialog asking for width and height in pixels. For a first drawing, 1920 × 1080 pixels is a good size—large enough to see detail but not so large that your computer slows down. Set the color mode to RGB (red, green, blue) if you plan to share the image on screen, or CMYK if you plan to print it. Leave the fill color as white unless you want a colored background.

Click Create or OK. A blank canvas appears. Before you start drawing, set up your workspace. Look for the Brushes panel (usually on the right side). If you do not see it, go to Windows > Dockable Dialogs > Brushes in GIMP, or Windows > Dockable Dialogs > Brushes in Krita. This panel shows all available brushes. Pick a round, soft brush to start—it is forgiving and works for sketching, shading, and painting.

Choosing Colors and Drawing Your First Strokes

Look for the color selector, usually shown as two overlapping squares (one foreground color, one background color). Click the foreground color to open the color picker. Choose a dark color like black or dark gray for sketching. Once you have a color and brush selected, click and drag on the canvas to draw. Your line will follow your mouse or stylus movement.

If you make a mistake, press Ctrl+Z (Windows) or Command+Z (Mac) to undo the last stroke. You can undo many steps in a row. Do not worry about making perfect lines at first—digital drawing rewards loose, confident strokes over careful, hesitant ones. Draw a few straightforward shapes: a circle, a square, some wavy lines. Feel how the brush responds to speed and pressure (if you are using a stylus).

Using Layers to Organize Your Drawing

Layers are separate transparent sheets stacked on top of each other. You can draw on one layer, then add a new layer above it without affecting the first. This lets you sketch loosely on one layer, then draw clean lines on another layer above it, then add color on a third layer. Look for the Layers panel (usually on the right, below the Brushes panel). In GIMP, go to Windows > Dockable Dialogs > Layers if you do not see it.

To add a new layer, right-click in the Layers panel and select New Layer, or go to Layer > New Layer in the menu. Name it something clear like "Sketch" or "Linework". Draw on this layer. To draw on a different layer, click that layer in the Layers panel to select it. The selected layer is highlighted. When you draw, the stroke appears only on the selected layer. This separation makes it straightforward to change one part of your drawing without erasing everything else.

Adjusting Brush Size and Opacity

As you draw, you will need to change your brush size. Look for a Size slider in the tool options (usually at the top of the screen or in a panel on the left). Drag the slider to make the brush larger or smaller. You can also press the bracket keys: [ makes the brush smaller, ] makes it larger. This is faster than moving your mouse to a slider.

Opacity controls how transparent the brush is. At 100% opacity, your brush marks are solid. At 50% opacity, they are semi-transparent, and you can see through them to the layer below. Lower opacity is useful for shading and blending. Find the Opacity slider (usually near the Size slider) and adjust it as you work. Start at 100% for sketching and linework, then lower it to 30–60% for shading and soft edges.

Saving and Exporting Your Work

Drawing software saves files in its own format: GIMP saves as .xcf, Krita saves as .kra. These formats preserve all your layers so you can edit later. To save, go to File > Save As, choose a location and filename, and click Save. Do this often while you work—every 15 minutes or so—to avoid losing progress if the program crashes.

When you finish and want to share your drawing, you need to export it to a standard image format like PNG or JPG. In GIMP, go to File > Export As. In Krita, go to File > Export. Choose PNG if you want no quality loss and support for transparency (useful if your background is not white). Choose JPG if the file size matters and you do not need transparency. Name your file, select the format, and click Export. The software will ask about compression settings; the defaults are fine for most uses.

Common Mistakes and How to Avoid Them

The most common mistake is drawing with the wrong layer selected. You draw, nothing appears, and you think the software is broken. Check the Layers panel: make sure the layer you want to draw on is highlighted. Another mistake is forgetting to undo before trying a different approach. If a stroke does not look right, undo when ready (Ctrl+Z) rather than trying to paint over it—painting over usually makes it worse.

A third mistake is using a brush that is too small or too large. If your brush is tiny, every stroke takes forever. If it is huge, you lose control. Start with a medium size (around 50 pixels) and adjust as you work. Finally, do not save your work as JPG while you are still editing. JPG compresses the image and loses quality each time you save. Save as your software's native format (.xcf or .kra) while editing, then export to JPG only when you are completely done.

Frequently Asked Questions

Can I draw on a computer with just a mouse?

Yes. A mouse is harder to control than a stylus, and you cannot use pressure sensitivity, but you can still draw, paint, and create finished work. Many digital artists started with a mouse. If you enjoy drawing on a computer, a graphics tablet becomes a worthwhile investment later.

What is the difference between PNG and JPG?

PNG preserves every pixel exactly as you drew it and supports transparent backgrounds. JPG compresses the image to make the file smaller, which can make edges look slightly blurry. Use PNG for artwork you might edit later or want to share at high quality. Use JPG for photos or when file size is important.

Do I need a graphics tablet to draw digitally?

No. You can draw with a mouse or touchpad. A graphics tablet with a stylus feels more natural and lets you use pressure sensitivity (thicker lines when you press harder), but it is not required to start. Many beginners use a mouse first and add a tablet later if they want one.

How do I make straight lines?

In most drawing software, hold Shift and click two points to draw a straight line between them. In GIMP and Krita, you can also select the line tool from the toolbox, then click and drag to draw a straight line. This is faster than trying to draw straight by hand.

What happens if I accidentally delete a layer?

Press Ctrl+Z (or Command+Z on Mac) to undo the deletion. The layer will reappear. If you have closed the file without saving, the layer is gone. This is why saving often matters—if something goes wrong, you can close without saving and reopen the last saved version.