Hi acevipa,

Originally Posted by
acevipa
Generally, I use 2 slashes \\, but it's not working.
\\ breaks a line, but it's not a spacing command. If required, you could use an optional parameter to increase the spacing like \\[2mm]. But I'm using \\ rarely, especially not for paragraph breaks, those are done by an empty line as you know or by \par. The spacing between pararaphs should be modified in another way.

Originally Posted by
acevipa
how do I add extra spaces after paragraph
It would be consistent to modify it for the whole document. Use \setlength and \parskip like mentioned by Opalg. If you choose paragraph spacing, I would set the paragraph indentation to 0:
Code:
\setlength{\parindent}{0pt} Otherwise paragraphs would be twice emphasized.
It would be good to use the parskip package, perhaps together with adjusting \parskip:
Code:
\usepackage{parskip}
\setlength{\parskip}{\baselineskip} The package sets the indentation to 0 automatically.

Originally Posted by
acevipa
Also how do I change the font size throughout the entire article.
Use the corresponding option for the documentclass:
Code:
\documentclass[12pt]{article} Possible values are 10pt, 11pt and 12pt. The extsizes classes offer base font sizes from 8pt to 20pt. The very recommendable KOMA-Script classes even allow arbitrary base font sizes given in arbitrary units:
Code:
\documentclass[fontsize=5mm]{scrartcl} Stefan
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