How can I find out about the available fonts on the thumbnail daemon?
Looking for a Black (font-weight: 900) sans-serif.
Can you elaborate why want to use the thumbnailer’s system fonts instead of including a web font (or just setting a custom thumbnail)?
Hi. Well, I want to have the thumbnailer create a ‘billboard’ that looks as similar as possible to the one created in my default browsers on my Mac, responsively. So aspect ratio is also adapted. Defaults to 16:9 and switches to 16:10 on thumbnailer.
In my browser, I have Avenir Next (Black) and Arial Black. Looking for a similar Black font on thumbnailer.
I try to avoid loading a (Google) font for now.
Never have been able to dynamically obtain a browser fontlist.
I really recommend to create a custom helper for this, if you want full control over the design. You can wrap your CSS and markup inside an SVG foreignObject and render that to a canvas. Then you only need to right click the canvas and paste it as a custom thumbnail.
You’re loading one every time you open a notebook. 
That’s by design. You can only probe for fonts by changing a font and measuring changes in text dimensions, but there’s no way to obtain a list of fonts.
2 Likes
Thanks for your replies.
I’ll be picking a Google font then. Seems the easiest way to get max consistency in appearance across platforms.