Q:

Misaligned paragraph (after subsubsection)

I'm new to LaTeX & LyX. I find that in LyX, when I have a "subsubsection" then "standard" block of text, it looks like 

where the immediate line after the subsubsection is aligned with the header while following paragraphs are not.  Why is that?  How do I align them? 

A:

that is the default behavior of new paragraphs which have an indented first line.  Put 

\noindent before that line
add % to the empty line before that paragraphs which should'nt be indented the first line
set \parindent=0pt and \parskip=0.5\normalbaselineskip plus0.3ex minus 0.2ex into the preamble
or choose parskip=half into the optional argument of the documentclass when using a KOMA class

A:

Ok I solved this by going Document > Settings > Text Layout.  Select Vertical Space instead of Indentation

