The fastest way to resize the eraser tool

Open the Eraser tool from the left toolbar or press Shift+E. Once the tool is active, look at the top menu bar — you will see a brush size field with a number and a dropdown arrow. Click that number field and type a new size, or use the slider next to it to adjust the eraser width in real time. The size appears in pixels and ranges from 1 to 500.

If you do not see the size controls in the top menu, your toolbar may be in a different view mode. Go to Window > Eraser Tool Options to open a dedicated panel where you can adjust size, angle, and roundness all in one place.

Key Takeaways

  • The Eraser tool size is controlled from the top menu bar when the tool is active, or from the Eraser Tool Options panel under Window.
  • You can type a specific pixel size or drag the slider to change the eraser width between 1 and 500 pixels.
  • Holding Bracket keys on your keyboard — [ to shrink and ] to grow — lets you resize the eraser without opening any menu.
  • The eraser size resets to its last-used setting each time you switch back to the tool, so you do not have to resize it every time.

Using keyboard shortcuts to change size faster

The quickest method once you are erasing is to use your keyboard. Press the left bracket key [ to make the eraser smaller or the right bracket key ] to make it larger. Each press changes the size by one pixel, so hold the key down to resize continuously.

This works while the Eraser tool is active and you are hovering over your canvas. You do not have to stop erasing or open any panel — just tap the bracket keys and keep working. This is much faster than clicking the size field in the menu bar.

Adjusting eraser hardness and angle

Size is only one property of the eraser. The Eraser Tool Options panel also controls hardness — how soft or sharp the eraser edge is — and angle, which matters if you are using a pressure-sensitive tablet. A hard eraser (100%) removes pixels cleanly; a soft eraser (0%) fades out gradually.

To open this panel, go to Window > Eraser Tool Options. You will see sliders for Size, Angle, Roundness, and Hardness. Adjust any of these while the Eraser tool is selected, and the changes take effect when ready on your canvas.

Why your eraser size keeps changing

If the eraser feels like it is getting bigger or smaller on its own, you may have pressure sensitivity turned on. If you are using a graphics tablet or stylus, Illustrator can scale the eraser size based on how hard you press. This is useful for detailed work but can feel unpredictable if you did not enable it intentionally.

To turn off pressure sensitivity, open the Eraser Tool Options panel and look for the Pressure setting. If it shows a stylus icon or a percentage above zero, click it to disable it. Once pressure is off, the eraser will stay at the size you set regardless of how hard you press.

Eraser size limits and when to use a smaller one

Illustrator caps the eraser at 500 pixels wide, which is large enough for most work. However, if you are erasing fine details or working on a small object, a size between 5 and 50 pixels gives you much better control. Larger erasers are useful for clearing whole sections quickly, but they can erase parts of your artwork you meant to keep.

Start with a medium size — around 30 to 50 pixels — and use the bracket keys to shrink down when you need precision. This approach is faster than constantly resizing and keeps you from making mistakes on detailed work.

Saving your preferred eraser settings

Illustrator remembers the eraser size you last used, so if you set it to 25 pixels and close the file, it will be 25 pixels the next time you open the Eraser tool. However, this setting is not saved per document — it is a program-wide preference. If you work on different projects that need different eraser sizes, you will need to resize each time you switch between them.

There is no built-in way to save multiple eraser presets, but you can create a custom workspace that includes your preferred Eraser Tool Options panel size and position. Go to Window > Workspace > New Workspace, name it, and Illustrator will restore that panel layout whenever you select that workspace.

Frequently Asked Questions

Can I make the eraser bigger than 500 pixels?

No. Illustrator caps the eraser at 500 pixels. If you need to erase a very large area, use the eraser at maximum size and make multiple passes, or select the area with a selection tool and delete it instead.

Why does my eraser size change when I switch tools?

It does not — the eraser remembers its last size. If it looks different, you may have pressure sensitivity on, or you may be looking at a different tool. Double-check that the Eraser tool is selected and that Pressure is off in the Eraser Tool Options panel.

Does eraser size affect how fast it erases?

No. A larger eraser covers more area per stroke, but it erases at the same speed as a small one. The size only changes how much of your artwork is removed with each click or drag.

Can I undo eraser strokes?

Yes. Press Ctrl+Z (Windows) or Command+Z (Mac) to undo your last eraser stroke. You can undo multiple strokes by pressing the shortcut repeatedly, up to the number of steps Illustrator has in its history.