Boom!
This is how you do it. (I am amazed how little fees there are on Polygon.)
However I now need more, so I bought some SWAP.MATIC on LeoDex.
(1 MATIC = 1.96 CAD on 250322)
Next make sure you have KeyChain enabled.
Visit TrivalDex.com/wallet and select withdraw.
Choose Polygon (Matic) on the drop down menu.
Enter your Polygon address correctly, and click Withdraw. Sign the KeyChain transaction, and then impatiently refresh your PolygonScan address until it appears a few minutes later.