+,
+\series bold
+
+\backslash
+ointop
+\series default
+ etc., the limits are by default set beside the operator.
+ But for multiple integrals the limits are often set below the operator.
+ In the following example the limits type was therefore set to
+\series bold
+Display
+\series default
+ and so set below the integrals:
+\begin_inset Formula
+\begin{equation}
+\iiint\limits _{V}X\,\mathrm{d}V=U\label{eq:VolInt}
+\end{equation}
+
+\end_inset
+
+
+\end_layout
+
+\begin_layout Standard
+\begin_inset VSpace medskip
+\end_inset
+
+To specify conditions for limits, the commands
+\series bold
+
+\backslash
+subarray
+\series default
+
+\begin_inset Index idx
+status collapsed
+
+\begin_layout Plain Layout
+Commands ! S !
+\backslash
+subarray
+\end_layout
+
+\end_inset
+
+ and
+\series bold
+
+\backslash
+substack
+\series default
+
+\begin_inset Index idx
+status collapsed
+
+\begin_layout Plain Layout
+Commands ! S !
+\backslash
+substack
+\end_layout
+
+\end_inset
+
+ are used.
+ To create for example this expression
+\begin_inset Formula
+\begin{equation}
+\sum_{\begin{subarray}{c}
+0<k<1000\\
+\\
+k\,\in\,\mathbb{N}
+\end{subarray}}^{n}k^{-2}\label{eq:substack}
+\end{equation}
+
+\end_inset
+
+
+\end_layout
+
+\begin_layout Standard
+the following has to be done:
+\begin_inset Newline newline
+\end_inset
+
+First the command
+\series bold
+
+\backslash
+sum
+\series default
+^
+\series bold
+n
+\begin_inset space \textvisiblespace{}
+\end_inset
+
+_
+\series default
+ is typed in.
+ One is now in a blue box under the summation operator and insert there
+ the command
+\series bold
+
+\backslash
+subarray
+\begin_inset space \textvisiblespace{}
+\end_inset
+
+
+\series default
+.
+ The blue box is now within a purple box and now several lines can be written
+ among each other.
+ A new line is created by inserting a line break (
+\begin_inset Info
+type "shortcut"
+arg "newline-insert newline"
+\end_inset
+
+).
+ When now
+\begin_inset Newline newline
+\end_inset
+
+
+\series bold
+0<k<1000 Ctrl+Return
+\begin_inset Newline newline
+\end_inset
+
+
+\series default
+is typed in, a new box appears below for the new line.
+\end_layout
+
+\begin_layout Standard
+The alignment of the lines can be changed to left aligned with the
+\family sans
+table
+\family default
+
+\family sans
+toolbar
+\family default
+ or the menu
+\family sans
+Edit\SpecialChar menuseparator
+Rows &Columns
+\family default
+.
+ To get right alignment,
+\series bold
+
+\backslash
+hfill
+\begin_inset space \textvisiblespace{}
+\end_inset
+
+
+\series default
+ is inserted at the beginning of the line.
+\end_layout
+
+\begin_layout Standard
+The command
+\series bold
+
+\backslash
+substack
+\series default
+ is equivalent to
+\series bold
+
+\backslash
+subarray
+\series default
+ with the difference that the lines are always centered.
+\end_layout
+
+\begin_layout Standard
+\begin_inset VSpace bigskip
+\end_inset
+
+Like in formula
+\begin_inset CommandInset ref
+LatexCommand eqref
+reference "eq:substack"
+
+\end_inset
+
+ there can be too much space beside an operator, because the characters
+ following the operator are set beside the limits.
+ To avoid this the command
+\series bold
+
+\backslash
+smashoperator
+\series default
+
+\begin_inset Index idx
+status collapsed
+
+\begin_layout Plain Layout
+Commands ! S !
+\backslash
+smashoperator
+\end_layout
+
+\end_inset
+
+ can be used.
+ To activate it, set in the document settings under
+\family sans
+Math
+\begin_inset space ~
+\end_inset
+
+Options
+\family default
+ for the package
+\series bold
+mathtools
+\series default
+
+\begin_inset Index idx
+status collapsed
+
+\begin_layout Plain Layout
+Packages ! mathtools
+\end_layout
+
+\end_inset
+
+ the option
+\family sans
+Load
+\begin_inset space ~
+\end_inset
+
+always
+\family default
+.
+
+\series bold
+
+\backslash
+smashoperator
+\series default
+ sets the space besides the operator to 0
+\begin_inset space \thinspace{}
+\end_inset
+
+pt.
+\begin_inset Newline newline
+\end_inset
+
+Applied on formula
+\begin_inset CommandInset ref
+LatexCommand eqref
+reference "eq:substack"
+
+\end_inset
+
+, one uses the command
+\end_layout
+
+\begin_layout Standard
+
+\series bold
+
+\backslash
+smashoperator{
+\end_layout
+
+\begin_layout Standard
+and inserts the operator with its limits into the braces.
+ Behind the brace one continues the formula:
+\begin_inset Formula
+\[
+\smashoperator{\sum_{\begin{subarray}{c}
+0<k<1000\\
+\\
+k\,\in\,\mathbb{N}
+\end{subarray}}^{n}}k^{-2}
+\]
+
+\end_inset
+
+
+\end_layout
+
+\begin_layout Standard
+It is possible to set the space of only one side of the operator to 0
+\begin_inset space \thinspace{}
+\end_inset
+
+pt.
+ To do this write either
+\series bold
+[l]
+\series default
+ or
+\series bold
+[r]
+\series default
+ between
+\series bold
+
+\backslash
+smashoperator
+\series default
+ and its brace.
+
+\series bold
+l
+\series default
+ stands for the left and
+\series bold
+r
+\series default
+ for the right side of the operator.
+ Here is an example of the possible