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Can you explain me how I can install this for Texmaker on my mac?
Nope, sorry.

Texmaker is only an editor. Usually you have some (La)TeX distribution like TexLive that comes with a package manager to handle the installation of new packages. GNU/Linux distributions often come with LaTeX integrated ...

Did you have a look at pgfgantt?

This seems to be a bug for me, did you already report it to Markus Kohm, the author and maintainer of KOMA-Script?
I tried to, but the relevant website demands registration with full name, which I never do on the Internet. Maybe I'll create a plausible fake identity but that requires some time...

Improving the overall layout of my thesis I learned about \looseness and \enlargethispage which helped me a lot in avoiding unwanted page breaks.

However, in one place where I use \enlargethispage LaTeX keeps showing the following message:
Overfull \vbox (0.94386pt too high) has occurred while ...

But this only changes part of the arrow to green.
Can someone help with this?
You are using open triangle s, which are always white. That's why they are called "open". If you want the whole filling to be green, you will have to use filled triangles as well and set their fill color to green. The ...

As far as I understand, I can simply make a path, draw all the lines and curves, and then fill them as in the example code below
[...]
There is this weird line from the starting point to somewhere in the "pointy" end of the figure. Can you see what is wrong? :(
There are two things that contribute ...

Is it possible to do any of the following?

assign a color to a single point?
assign a shape to a single point?
specify a particular date with xticklabel=\day , or some other way?

Just use individual addplot commands and overwrite the important points. You may also use ordinary TikZ (see ...

I want to put some text in between the space between two figure which are side by side. For example + between figure 1 and figure 2 and = between figure 2 and figure 3. so it will look like figure 1 + figure 2 = figure 3
Well, just do it ;-)

\documentclass[11pt]{article}
\usepackage[T1]{fontenc ...

\DeclareCaptionLabelFormat{autodot}{#1~#2\autodot}
\captionsetup[listing]{labelformat=autodot}

(This one will add the "autodot" feature to the listing environment.)
or

\DeclareCaptionLabelFormat{period}{#1~#2.}
\captionsetup{labelformat=period}

(This one will add the dot to all floating ...

For a class of KOMA-Script you may use the built-in mechanism by the \DeclareNewTOC command for the new float environment

Thanks for your help! This works pretty well, except for two problem: A minor issue is that I need to use the listname option because otherwise the environment name is set ...