I was delighted to find that "expand selection" was a supported function, doubly so when I noticed that it was ctrl+w (what I'm used to and this may be from the IntelliJ defaults), but it... doesn't do anything.

Even selecting it from the menu does nothing.

An internet search turned up nothing useful. And oddly 'expand selection' is not listed in the keymap?

None of this makes any sense. And if expand selection doesn't work I'm simply not going to use it.

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edit: I found that (possibly my intellij mappings) remapped ctrl+w to "close editor" and I deleted that and now it works.

It's weird that it's not to be found in the keymap editor though... I had to manually insert it as a binding AND why would it show up as "Expand Selection Ctrl+W" in the select menu when it isn't? That's got to be a bug or two.