The costume tab is where you can decide what to wear and how to wear it.
To find the costume tab go to Account
>Costumes.
Do you have a wearable? Great! Skip to step 2. If not, you can learn how to buy one from How to buy a wearable.
To put a wearable on your avatar, hover your cursor over the Select a Wearable
field and a list of the wearables you own should appear.
Select the wearable you want and it will appear in the preview.
To place the wearable where you want it, select the Bone
dropdown and chose the appropriate bone.
To move, rotate or scale you can use two different tools.
This refers to using the 9 fields alowing you to rotate,position and scale your wearable with precision.
This refers to the three icons allowing you to rotate,position and scale your wearable.
lets you edit the position
lets you edit the rotation
lets you edit the scale
This method is buggy as at v4.32.
Don't forget to hit Save after your edits.