I just realized that Illustrator and Photoshop's versions of the "Save for Web" panel have the Save/Cancel/Done buttons in the same place but in different order. Maybe that's why I always accidentally cancel out of them so often — I mean to click "Save" but click "Done" by mistake.

Useful new-to-me Google Docs feature: Right click on a selection of text and copy the snippet in Markdown format — links and everything. There's also a "Paste from Markdown" option to go the other direction. support.google.com/docs/answer/...