just to the left of the properties tab, on the same pallet, is an arrow that points sideways. On your image, it looks like it's pointing at your search bar. Click on that arrow and then on show hidden parameters. The scale dials should show up.

If this shirt is conforming and made for that figure, you can also select the body of the shirt, click on the properties tab and check the include scales box so that it keeps size with your figure and you don't have to do it manually.

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Available on Amazon for the Kindle E-Reader Monster of the North and The Shimmering Mage

Today I break my own personal record for the number of days for being alive.
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I use Poser 13 and win 10