How to spoiler something

[LSLGuy]

Small belongs in angle brackets, not square brackets. Like <small>

For more on sizes see this post and below:

How do you do imbedded quotes?

Depending on which UI style your audience is using and whether on a phone or a computer, your audience may see insert as bold and delete as strikethough, both with no color. Or they may see them as green and pink highlighter respectively. Or maybe something else altogether. Easy Peasy. You can go 3 steps of small, smaller, smallest . But only one of Big, Not Bigger (but should be).