10
votes
3answers
339 views

How do I figure out the right size font / text for a given read distance?

To avoid printing single letters at varying sizes and measuring how far away I can see it from a distance is there a formula for determining what size font for a particular read distance? Is it better ...
9
votes
2answers
872 views

Can I freely use the fire exit symbol and similar ISO symbols?

I've been doing some research into this symbol (part of ISO 7010), which I'd like to use: but I can't find out whether I'm allowed to or not. Is the glyph in the public domain? What about similar ...