There is no mt-20
in Bootstrap 4. The Bootstrap 4 margin classes are…
m{sides}-{size}
Where size is from 0-5, and size is a portion of the default spacer unit of 1rem
- 0 – eliminate the margin
- 1 – set the
margin to.25rem
- 2 – set the margin to
.5rem
- 3 – set the margin to
1rem
- 4 – set the margin to
1.5rem
- 5 – set the margin to
3rem
So you can use mt-3
, mt-4
, mt-5
etc..
http://www.codeply.com/go/29IGJHkqVd