To adjust position, rotation and scale of an accessory:
Click the Character 
button.
Click the Accessories 
button.
Click the Modify tab in the file manager.
Select the accessoryfrom the accessory list by clicking the radio button.
Use the Position pull-down list to change the body part the accessory attached to.
Use the controls in the Adjust field to move, rotate or scale the selected accessory.
Use the controls to:
move the selected accessory left/right, up/down, back/forward
rotate the selected accessory back/forward, clockwise/counter clockwise, left/right
scale the selected accessory. Check Lock XYZ check box to keep the proportion while scaling.
Click Reset 
button to reset the accessory to its original transform.
If you like to keep the result for later use, click the
Add 
button to add the accessory to the Custom tab.
Animating accessories
You can set position and orientation keys in Timeline Editor, See Animation Timeline Editing for details.