How do I see how my delegate voted?

First, get the address of your delegate. 

1. Browse to the contract on Etherscan.
2. Expand delegates.
3. Paste your address in the text field and click Query.
4. The response is the address of your delegate, copy it.

Then, to get the delegate's snapshot votes:

1. Browse here.
2. Paste the delegate's address in the URL after the https://snapshot.org/#/profile/
3. See the snapshot votes in which the delegate participated (both for Optimism and other votes).