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• ↓ In situ Syntax Highlighting in macOS Applications Like Keynote
• ↓ Eighteen
• ↓ Accessible (I Think) Split-Cell Table Headers
• ↓ Canvas-ing the Web
• ↓ Targeting by Reference in the Shadow DOM
• ↓ Custom Asidenotes
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"Earlier this month, I returned to CSS Day for the first time since 2018 to deliver my first in-person talk since 2022.  “Forging Our Own Paths” should be available at some point; in the meantime, for the six or seven people in my audience who might need to do something similar, I’d like to share a small macOS workflow I developed to make syntax-highlighting code blocks in situ in Keynote a lot simpler.  The end result is to have an entry (or entries) in the Services submenu of the contextual (right-click) menu for highlighted text.  All this is adapted from an old blog post I found copied in a few places, and which needed some updates to make things work in 2026."

"First, install highlight.  I used brew install highlight, and the rest of this piece assumes you’ve done it that way.  If you install it another way, such that it ends up in a different location than Homebrew would give it, you’ll need to modify a variable value later on, which I’ll point out when we get there."

"Next, you need to install the following (also available as a gist) as a shell script called keynote-highlight:"

"Put the script wherever you store your shell scripts, and make sure it’s both executable and can be invoked from the command line.  I believe, without any real basis for doing so, that if you already have syntax-highlight installed, which is (among other things) a wrapper around highlight, you could use it by modifying the highlighthome variable assignment to point to it rather than highlight, as well as modifying a variable in an upcoming bit of code.  But, as I say, I’m just guessing about that."

Key Topics & Focus Areas for meyerweb.com:

In situ Syntax Highlighting in macOS Applications Like Keynote

Eighteen

Accessible (I Think) Split-Cell Table Headers

Canvas-ing the Web

Targeting by Reference in the Shadow DOM

Custom Asidenotes