I am sure there is no single package dedicated to the items you list, including "etc.", except perhaps savetrees:
The goal of the savetrees package is to pack as much text as
possible onto each page of a LaTeX document. Admittedly, this makes
the document far less attractive. Nevertheless, savetrees is a
simple way to save paper when printing draft copies of a document. It
can also be useful when trying to meet a tight page-length requirement
for a conference or journal submission.
On a case-by-case basis, the following might be of use:
Consider using the setspace package. Read more about adjusting the line spacing from the UK TeX FAQ entry: Why doesn't \linespread work?
Standard document class (like article, book and report) allow for passing optional arguments regarding the default font size. For example,
\documentclass[10pt]{article}
will produce a document with default 10pt font size. Other options include
\usepackage{fix-cm}% http://ctan.org/pkg/fix-cm
or
\usepackage{anyfontsize}% http://ctan.org/pkg/anyfontsize
or using the memoir document class which allows font size selections from 9pt to 60pt by default.
geometry is king when it comes to layout specification. For example,
\usepackage[margin=1cm]{geometry}% http://ctan.org/pkg/geometry
will leave a 1cm margin (on all sides), without having to fiddle with other lengths.
- Space between bullet points:
In general, list management is easily made possible via enumitem. For example, inter-item separation is set using
\begin{itemize}[noitemsep]
\item ...
...
\end{itemize}
would leave no separation between items. The option nosep will kill all vertical spacing.
- Spacing between equations:
If you're referring to the spacing above/below equations in surrounding text, then you need to modify the lengths \abovedisplayskip, \abovedisplayshortskip, \belowdisplayskip and \belowdisplayshortskip. These lengths define the skip (and stretch/shrink) above and below an equation if the preceding/following paragraph has a short line or not.
If you're using amsmath's align (and friends) environment, then the spacing between equations are usually set via the length \jot. Therefore, modifying this length would provide a tighter spacing between elements within that environment.
The above concepts both deal with vertical spacing. There's more options (like vertical spacing in array or tabular) contained within Herbert Voß' mathmode document (details will follow). Horizontal spacing is also something you can tighten within mathmode. For more on this, see the mathmode document (section 11 Space, p 28).
Finally, you could also follow the approach in How to scale entire document including Maths symbols? to compress a number of pages onto one using pdfpages's nup option. This would require a two-stage process of creating the regular information (phase 1), and then a compressed version via pdfpages (phase 2).
Best Answer
A) Document > Setings ... > Text layout >
0pt.B) Set spaces around the display mode:
But not in the preamble, so you will need a ERT TeX box (Ctrl+L) to insert this at some point before the first formula.
Alternatively, in the Math toolbar, change the display mode (Ctrl+Shift+H) by online mode (Ctrl+H) but if you maintain formulas at center do not use the normal center environment as this increase the vertical space. Use a ERT box with
\hfilbefore each formula.BTW, beside the horrible layout, it is not a good idea fix every length to
0ptas this limit LaTeX options to fit things properly. Whenever possible left some glue, like2pt plus 1 pt minus 1 pt.