Rename "Algorithm" to "Listing"

Solution

Do not mix lst: with Algorithm floats. The previous solution used \newcommand{\algorithmname}{Listing}, but this could result in LaTeX Error: Command \algorithmname already defined. Instead, apply the following changes:

1. Rename lst: to alg:.
2. Change the preamble to:

   \usepackage{float}
   \floatname{algorithm}{Listing}
   \renewcommand{\algorithmname}{Listing}
   

This does not change the "List of Algorithms" to "List of Listings". The text is found in "stdfloats.inc":

Float
    Type                  algorithm
    GuiName               Algorithm
    Placement             tbp
    Extension             loa
    NumberWithin          none
    Style                 ruled
    ListName              "List of Algorithms"
    LaTeXBuiltin          false
End

The improper way to fix this is:

1. Edit stdfloats.inc.
2. Change "List of Algorithms" to "List of Listings".
3. Click Tools >> Reconfigure.
4. Restart LyX.

At this point, "List of Algorithms" will read "List of Listings".

Fora separate doc add in Document > Settings > Local Layout:

Float
    Type                  listing
    GuiName               Code Listing
    Placement             tbp
    Extension             lol
    NumberWithin          none
    Style                 ruled
    ListName              "List of Listings"
    LaTeXBuiltin          false
End

Then you can insert this with menu Insert > Float > Listing. This makes the choice document-specific and allows you to use both, rather than change the entire Lyx install.

I changed the List of Algorithms to List of Listings with:

\renewcommand{\listofalgorithms}{ 
  \begingroup 
    \listof{algorithm}{List of Listings} 
  \endgroup 
}