Jtdylktuy

documentclass[letterpaper,10pt]{article}



begin{document}

textbf{ Large Blahblahblah}

end{document}

For some reason textbf or Large creates this extra unwanted space from the left margine. How do I get rid of it? hfill does nothing to shove the text back into place, begin{flushleft}... lied and doesn't actually flush textbf left.

The issue has nothing to do with boldface versus normal. Rather, you see the default indent of paragraphs. One way to switch it off (for one paragraph) is to use noindent.

documentclass[letterpaper,10pt]{article}



begin{document}



A normal paragraph.



textbf{Large A normal bold paragraph.}



noindent

A normal paragraph with texttt{textbackslash noindent}.



noindenttextbf{Large A bold paragraph with texttt{textbackslash noindent}.}

end{document}

There are two separate issues that keep the text from starting at the left-hand margin of the text block. Neither issue is actually associated with the fact that the text string happens to be rendered in bold&large.

Let's begin by studying an augmented version of the OP's MWE, along with a screenshot of the associated output. (The vertical line down the left-hand edge represents the edge of the text block.)

documentclass{article}

usepackage{showframe} % to show edges of text block

newcommandOnce{Once upon a time, dots} % test text string

begin{document}

vspace*{1mm}  % just for this example



textbf{ Large Once} % OP's example



textbf{Large Once} % no space before "Large"



Once % normal font size and font weight



noindent

textbf{Large Once} % no more indentation!



setlengthparindent{0pt} % suppress paragraph indentation globally

textbf{Large Once}

end{document}

As the third line shows, the indentation issue is not caused by the fact that the text string is rendered in bold/large. Instead, it happens because (a) the text string occurs at the start of a (logical) paragraph and (b) the article document class (along with many other document classes) sets a non-zero value of parindent, which is the parameter that governs how much the first line of a paragraph is indented.

Notice also that the first line is indented even more than the second line is. What is the difference between textbf{ Large Once} and textbf{Large Once}? It's the whitespace character between { and Large. TeX does not gobble up all whitespace character. Beware the Ides of March. And beware carelessly inserted whitespace.

The fourth and fifth lines show how to suppress the indentation of the first line of a paragraph: For one-off suppression, use noindent; for global suppression, set parindent to 0pt. Aside: If you set parindent to 0pt, you should probably also set parskip -- the parameter that governs the amount of vertical whitespace between paragraphs to a non-zero value, e.g., setlengthparskip{0.5baselineskip}.