It is a unicode character: βΆ = ▶
http://www.fileformat.info/info/unicode/char/25b6/index.htm
See: What characters can be used for up/down triangle (arrow without stem) for display in HTML?
Answer from Diodeus - James MacFarlane on Stack OverflowVideos
Does anyone know how to change the + and - to those solid triangles pointing > and V that are commonly used in buttons/collapsible?
.bArticle:after { content: '\02795'; /* Unicode character for "plus" sign (+) / font-size: 13px; color: black; float: right; margin-left: 5px; margin-bottom: 5px; }
.active:after { content: "\2796"; / Unicode character for "minus" sign (-) */
Sorry if i didn't format very well, I know I should change the content: "____" but I don't know what to change them to. I tried a bunch of random unicode lines I found on google but none of them seem to do the trick.