10.57.3 Can you answer these questions?

10.57.3.1 Why is there a difference between `FloatBarrier` and `clearpage`?

https://tex.stackexchange.com/landing/r/digest?cta=question&id=725272

@David Carlisle wrote in a comment to a question 
In answer to your question about floatbarrier it doesn't "act like" 
\clearpage it is \clearpage that is its definition, \floatbarrier = 
&... 
[marginpar] [marginnote] [placeins]
 

asked by user855443 https://tex.stackexchange.com/landing/r/digest?cta=user&id=161067 Score of 1

answered by David Carlisle https://tex.stackexchange.com/landing/r/digest?cta=user&id=1090 Score of 0

10.57.3.2 Two columns switching sides on every page in flowfram

https://tex.stackexchange.com/landing/r/digest?cta=question&id=725040

I am working on a template for a student newspaper, and have set up a flowframe that alternates on each page. 
\documentclass{article} 
\usepackage{flowfram} 
\usepackage{geometry} 
\usepackage{lipsum} 
\... 
[multicol] [geometry] [flowfram]
 

asked by admad https://tex.stackexchange.com/landing/r/digest?cta=user&id=335933 Score of 1

10.57.3.3 Side notes in one paragraph

https://tex.stackexchange.com/landing/r/digest?cta=question&id=725149

I'm looking for solutions to typeset margin/side notes 
vertically in a marginpar starting from the bottom next to the main text body, similar to what was achieved here, and 
capable of handling ... 
[footnotes] [marginpar] [marginnote] [sidenotes]
 

asked by K. Shen https://tex.stackexchange.com/landing/r/digest?cta=user&id=336280 Score of 1