How do I deselect using the box select tool? I have read about middle mouse button and some other shortcuts but they don't work for me.
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I use to have a mouse with a scroll wheel, but it had no middle mouse click. This might be your issue. – CharlesL Jul 18 '13 at 13:35
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@CharlesL I do have middle mouse click. I can move the camera with it. – jobukkit Jul 18 '13 at 13:38
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Are you middle mouse clicking and dragging? You have to hold down middle mouse the entire time. – CharlesL Jul 18 '13 at 13:40
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@CharlesL I hold it down – jobukkit Jul 18 '13 at 13:44
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Try using emulate 3 button mouse and see if that works. – CharlesL Jul 18 '13 at 13:49
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2Does your deselect work when you use Circle Select (C) and the middle mouse button? – SteveW Jul 18 '13 at 21:53
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Remember not to hold down the B for box selecting. You press and release B and you enter a box selection mode... and from there you should be able to deselect with MMB. – Fweeb Jul 19 '13 at 12:47
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Just press A dude :) I mean you have to press it a few times but it does deselect ;) – Calin Feb 14 '17 at 09:55
4 Answers
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If using v2.68 (revision 57577+), you can do the following:
- Press B,
- Use LMB and drag to form the (de)selection rectangle,
- hold down Shift while releasing LMB.

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I am trying to select some faces after selecting. Instead of that, it selects other vertices that are also in the box. It doesn't deselect anything. – jobukkit Jul 18 '13 at 11:00
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i'm not sure why that doesn't work for you guys, I use it frequently. (i'm still on build r57660, 2.67.1) – zeffii Jul 18 '13 at 11:51
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It sounds like your issue is an issue with the middle mouse button on your mouse. The following steps do not require a working middle mouse button to deselect:
- Go to your user preferences (CtrlAltU)
- Go to the Input tab
- In the left sidebar, check the Emulate 3 Button Mouse checkbox
- Whenever instructions say to use the middle mouse button, you can now use Alt + Left Click instead.
To use box select to deselect use Alt + Left Click and drag.
CharlesL
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As described on the Blender wiki:
- B to enter border selection.
- Drag the deselection rectangular using your middle mouse button.
Aldrik
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1Thanks, but middle mouse button doesn't work, I already said that in the question. – jobukkit Jul 18 '13 at 11:00
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@Jop It does here. I thought it unlikely that you had found a bug and suspected you were just doing it wrong. – Aldrik Jul 18 '13 at 11:05
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@jop, you'll have to use alt instead. Go to your user prefs, go to input and check "Emulate 3 button mouse". Then replace alt-left click for middle click. – CharlesL Jul 18 '13 at 12:51
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At the time of writing this comment, this answer worked by default for the latest Blender version of the time. – Herpes Free Engineer May 30 '19 at 09:52
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I found that the easies solution is to just invert the selection and afterwards invert it again. This works with all selection tools and you just need to press Ctrl-I
Ralf
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