Word stop when navigating text with option-key

Question

I use option and command to navigate text (which is awesome). I've read somewhere that you can specify the characters that constitute a word stop (underscores for example). However I can't find this anywhere.

Does anyone know where to set this?

Answer 1

You can choose between a few settings in System Preferences, but I don't know any way to customize them.

The standard setting treats period and colon as part of (some) words.

ASCII special characters that are part of words:

• '.:_ in Standard
• '_ in English (United States, Computer)

ASCII special characters that are not part of the start or end of words:

• $+<=>^` in Standard
• $+<=>^` in English (United States, Computer)

aa.11 and aa'11 are never single words. 11.11 and aa_11 are always single words.