# How to align bones so their rotations are the same?

I'm fairly new to Blender and am having some problems with skeletons/armatures, specifically aligning fingers on a hand so they are rotated facing the same way. I can't find an option to do it in edit mode and it's making my end product rotate weirdly, mainly the thumb.

So say, I have a bone like this:

If I wanna align a bone in 3DS Max I press Alt-A which brings up an option to "Align" anything to anything, I can select transformations, rotations and scale, copying from the object I select afterwards. Here's an example:

So if I select all the transformations, rotations and scales, it'll place it in the exact same location, rotated in the exact same way and scaled the exact same way, but maybe I just want to align their rotations so their axes are the same, I can do that easily by just ticking the appropriate boxes. This is great for aligning bones so that they're all on the same axis.

Here, I just ticked the rotations and you can see the rotation data has been copied to the bone:

So I wanna have fingers all aligned perfectly as they tend to be in real life, in Max I just do that method I just said and I can align the finger bones so that their axes are lined up.

In Blender I can't seem to do this, I just have to guess and hope that I've placed things so they're rotated the same. Is there some way to align the bones like I just showed in those images with Blender? Or am I stuck guessing and hoping things don't look too bad?

## How to align bones' orientation to reference bone's one.

Using custom orientation

Select Transform Pivot Point > Active Element,
Select a reference bone,
Make a custom orientation for the bone (Transfer Orientation > +icon),
Select other bones and activate the reference bone then
Press S shift+Y 0 Enter keys.

## How to align bones' roll values to reference bone's one.

Using Alt key

Select the bones and activate the reference bone,
Hold down Alt key and make Transform > Roll text to be editable then
Pree Enter key.

• This should be accepted answer! Detailed and well explained! Sharp and smart! Mar 12 at 7:23

You can add a bone Copy Rotation constraint then Apply Visual Transform to Pose then Apply Pose as Rest Pose.

As far as I can remember someone here in BSE had created a script to make this process faster, you may find it with a quick search.

• Can't you use Armature > Bone Roll > Recalculate or SHFT-N then Active Bone in Edit mode to recalculate a bone roll chain? Nov 25, 2020 at 15:03