7.34.3 Can you answer these questions?

7.34.3.1 How to modify the margins of all the article (margins refuse to budge)
7.34.3.2 display custom date with custom date format with datetime package
7.34.3.3 Balacing text on the right or left column in a two-columns paper after using a figure* environment
7.34.3.1 How to modify the margins of all the article (margins refuse to budge)

https://tex.stackexchange.com/landing/r/digest?cta=question&id=599885

I am writing an article and it has the text margins defined as: 
\usepackage[letterpaper,left=3.5cm,right=3cm,top=3cm,bottom=3cm]{geometry} 
At some point I wanted to introduce hyperlinks, and when I ... 
[margins] [texstudio]
 
asked by roybatty https://tex.stackexchange.com/landing/r/digest?cta=user&id=238845 1 vote
7.34.3.2 display custom date with custom date format with datetime package

https://tex.stackexchange.com/landing/r/digest?cta=question&id=599559

using 'datetime' package, one can produce a custom date with custom date format like this: 
\usepackage{datetime} 
\newdateformat{nwfmt}{\the\day, \THEDAY \monthday, \THEYEAR} 
\newdate{mydate}{21}{12}{... 
[datetime]
 
asked by user1850133 https://tex.stackexchange.com/landing/r/digest?cta=user&id=145290 1 vote
answered by Partha D. https://tex.stackexchange.com/landing/r/digest?cta=user&id=146828 0 votes
7.34.3.3 Balacing text on the right or left column in a two-columns paper after using a figure* environment

https://tex.stackexchange.com/landing/r/digest?cta=question&id=599599

I'm trying to set an entire image with a frame box at the top of the page using the environment figure*. The problem comes with the last row of the text in the right column (or left one) after ... 
[two-column] [text] [lengths] [png] [paper]
 
asked by Giacomo https://tex.stackexchange.com/landing/r/digest?cta=user&id=243536 1 vote