Update Installation.md

docs/Installation.md

@@ -1,5 +1,8 @@
 ## Installation of Julia
 
+<details>
+  <summary>Windows</summary>
+
 ### Windows
 Please download and install Julia using `juliaup`. Launch the `Command Prompt` app and type:
 
@@ -13,6 +16,11 @@ If that doesn't work, download https://install.julialang.org/Julia.appinstaller
 #### Optional
 It is suggested to install [Windows Terminal](https://learn.microsoft.com/en-us/windows/terminal/install) . Copy and paste works better, unicode works much better and you can use it with `bash` or `Command Prompt`, whatever you prefer. It is suggested to set one of these two as default using the `Settings` menu of Windows Terminal.
 
+</details>
+
+<details>
+  <summary>Linux</summary>
+
 ### Linux
 
 Copy and past the following line to install julia:
@@ -31,6 +39,11 @@ alias jl='./bin/run_julia'
 ```
 This makes it possible to run Julia with the shortcut `jl` later.
 
+</details>
+
+<details>
+  <summary>Mac</summary>
+
 ### Mac
 Please download and install `juliaup` as explained at https://github.com/JuliaLang/juliaup .
 
@@ -40,6 +53,8 @@ juliaup add 1.10
 juliaup update
 ```
 
+</details>
+
 ## Installation of the IDE VSCode
 It is useful to install the integrated development environment VSCode, even though it is not
 required. You can also use any editor of your choice. 
@@ -58,5 +73,3 @@ Julia development with VSCode is well documented here: https://www.julia-vscode.
 I would NOT use all the advanced features of julia-vscode, I prefer to just use the vscode terminal and launch julia
 from the terminal. This makes it easy to launch Julia with any command line options and also to start
 and restart Julia quickly.
-
-Continue with [README](../README.md)