Photoshop: Selection Tools don't quite match cursor position

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  • Updated 6 years ago
  • (Edited)
By using the rectangle selection tool: drawing a rectangle of i.e. 466x277 it changes to i.e. 540x379 by mouse-up. It's not possible to make it the size you want.

The same happens with the oval selection tool.

It's just not accurate and therefore not usable.
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Daniel Oudejans

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  • frustrated

Posted 6 years ago

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Chris Cox

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I don't think I've heard anyone else seeing this who didn't have an obviously bad mouse.

The size on mouse up should be exactly what it was when you stopped moving and released the mouse button.

If not, then something on your system is moving the mouse on mouse up.
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Daniel Oudejans

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The Adobe employees reproduced the same errors at their office.
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Kris Hunt

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I'm not seeing this behavior, either; not even in the beta. Do you have a feather amount set for those tools?
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Daniel Oudejans

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No I do not have set any feather amount. Visualize selecting the outline of a rectangle. When I place the cross exactly in the left top corner, the dotted line is placed 1 pixel inside left and 2-3 pixels inside top. It's just not possible to exactly select.

However in CS3 I never had any problem with this. So I still use CS3 instead of CS5.
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Chris Cox

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Your example wasn't off by 2-3 pixels. And I can't find any reports similar to this in our bug database.

Other than you forgetting about "snap to" settings, I'm not sure what you're actually describing.
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Kris Hunt

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Try unchecking "Enable OpenGL Drawing" in your preferences.
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Daniel Oudejans

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Hi Kris,

I did, nothing changed. Adobe helpdesk people also asked me to do this.
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Daniel Oudejans

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I made some screen prints.





In this image I selected the grey rectangle exactly on the outline from left-top.
Look at the outline of the grey rectangle, the cross and the dotted line.
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Chris Cox

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That shows it being off by a single pixel. That could be due to a video driver issue in the cursor or the selection (ATI drivers still have problems with that).

But most people aren't seeing such a problem in CS6 (where we've spent more time trying to work around the driver problems).
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Kris Hunt

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I had similar problems with CS5. Selections were always off by one or two pixels, but disabling OpenGL I think solved that problem. Of course, there were other problems with CS5 that prevented me from being able to use it.
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Daniel Oudejans

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Next to this when I draw a rectangle of a certain width and height (according to the Info window) and let the mouse up, it ends up with a complete different format. The difference can be up to tens of pixels.