How to increase or decrease post font size?

Soutien
1

I dont see any option.Can anyone suggest me a way to do it?

2

There was a way to do it before the latest update using BBCode, but it was limited to this:
<small>blah</small>
<big>blah</big>

3

#This is a way to try
##using the heading tag

from markdown

see code below

#This is a way to try
##using the heading tag 
### from markdown
#### see code below
4

For all?

Admin → Customize → CSS/HTML

.post-stream .cooked {
  font-size: 16px;
}

For You?

CTRL + +

5

Does for all increase post size for all existing posts and topics?

6

Yes, do you want anything else?

7

yes one more thing

How to add/change feature so that I see font size and color change option here :

sorry if i m asking for more

8

Check out