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Im trying to use Proportional Editing. I don't have a 3 button mouse. Is there a way to modify the field of influence without having a scroll wheel? I already have "emulate 3 button mouse" and "emulate num pad" turned on.


Update: Turns out, the Apple Magic Mouse that Im using does allow a scroll function if you swipe it down the middle. So I am able to get the functionality I am after. Thanks everyone for your suggestions.

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  • $\begingroup$ Im on a macbook air, and the trackpad just work like spected with 2 fingers gesture. Also, if you have a wacom with touch you can also do the gesture of the 2 fingers. $\endgroup$
    – tyoc213
    Jun 12, 2015 at 4:31

6 Answers 6

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Use the Page Up and Page Down keys to adjust the circle of influence.

Proportional Edit

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    $\begingroup$ Im using a Mac with the small keyboard. (Makes most key commands a little challenging with 3D apps. : ) ) Unfortunately, there are no Page Up Page Down keys on this keyboard. I did however discover that the Apple Magic Mouse that Im using does allow a scroll wheel type of function if you swipe it down it's middle. So I think Im all set. Thanks. $\endgroup$ Mar 10, 2015 at 13:33
  • $\begingroup$ @ThomasBricker Could you please click the check mark under the voting arrows to show this as the correct solution? $\endgroup$
    – J Sargent
    Apr 14, 2015 at 18:10
  • $\begingroup$ @ThomasBricker fn right and fn left are your page up/down keys. $\endgroup$
    – Wildcard
    May 10, 2019 at 23:41
  • $\begingroup$ What worked for me here in Blender 3.4.1 is Fn and the up/down arrow keys $\endgroup$
    – mcneela86
    Jan 5, 2023 at 8:08
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There is a workaround, but it isn't terribly convenient:

After you've completed the action, in the tool operator, which can be found in the tool bar T or by hitting F6, you can change the Proportional size.

enter image description here

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Using a magic mouse and you can not change the circle of influence? Well this works for me:

  1. Select the points.
  2. Activate the proportional editing button.
  3. Press G.
  4. Use two fingers to scroll up or down in your magic mouse.
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You can hit Alt and the + or - key on the numpad if you have a full sized keyboard to increases or decrease the circle size in Proportional Editing mode

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I'm using blender 2.79. None of the above worked for me, here's what did:

Select the vertex/vertices you want to edit, left click and drag until proportional circle appears (if you can't see it you should see a line on the top left screen showing the proportional editing values).

Keep left button held down and scroll up or down (or click FN + ⬆ Page Up/⬇ Page Down).

Also note that under user preferences I had emulate 3 button mouse selected.

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After choosing proportional followed by S, G etc use ⇧ Shift 1/2 to resize influence size

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