I am trying to create a header so that it looks like the image below such that the header is not right on top of the first line
However, I played with the dimensions on this MWE and can't seem to get it to work. I am wondering if I may be able to get some insight on how to do this.
\documentclass[12pt]{article}
\usepackage{fullpage} %full page typesetting
\usepackage{setspace} %allows for non-singlespacing
\usepackage{graphicx} %graphics capabilities
\usepackage{latexsym} %extra symbols
\usepackage{rotating} %rotation for figures
\usepackage{longtable} %tables that fill more than a single page
\usepackage{hyperref} %hypertext links in the document
\usepackage{natbib} %better bibliographies
\usepackage{authblk} %author and affiliation in opening
%Put name and page number on subsequent pages
\usepackage{fancyhdr}
\pagestyle{fancy}
\fancyhf{}
\setlength{\headheight}{14.5pt}
\rhead{\emph{Some Header}}
\cfoot{\thepage}
\renewcommand{\headrulewidth}{0pt}
\newcommand\e{\emph}
\newcommand\tb{\textbf}
\newcommand\un{\underline}
\newcommand\txt{\texttt}
\usepackage{blindtext}
\begin{document}
\blindtext
\end{document}

\headsepuwing\setlength{\headsep}{<length of your choice>}in your preamble, as also explained here: Setting the space between page header and text block – leandriis Nov 13 '19 at 19:03fullspacepackage. By default it sets the\headsepto 0, because it thinks you have no header (default isplainpage style, which doesn't have a header. By using\usepackage[headings]{fullpage}you specify that it does have headers. It would by itself use the page styleheadings, but you overwrite that withfancyhdr. – Pieter van Oostrum Nov 13 '19 at 23:29