LinkedIn allows very limited formatting such as using CAPS for things you want to stand out and special keyboard symbols.
Create your profile in a word document and then copy and paste it into your LinkedIn Profile. Add symbols for things you want to stand out such as <│ ▌► ◄ ♦ • ★☆>.
Once you have your profile uploaded into LinkedIn, be sure to view it and make sure it looks the way you want and has no errors in it.