docs: Clarify installation of themes

diff --git a/docs/content/themes/installing.md b/docs/content/themes/installing.md
index fd4a70c918fd936b2d13e0e93f5545013fcae3e5..bbadd96019829639e8bb65cb2f2f7e7dc32977e1 100644 (file)
--- a/docs/content/themes/installing.md
+++ b/docs/content/themes/installing.md
@@ -19,14 +19,27 @@ really a meta repository which contains pointers to set of contributed themes.
 ## Installing all themes
 
 If you would like to install all of the available Hugo themes, simply
-clone the entire repository from within your working directory:
+clone the entire repository from within your working directory. Depending 
+on your internet connection the download of all themes might take a while.
+
+> **NOTE:** Make sure you've installed [Git](https://git-scm.com/) on your computer.
+Otherwise you will not be able to clone the theme repositories.
 
 ```bash
-$ git clone --recursive https://github.com/spf13/hugoThemes.git themes
+$ git clone --depth 1 --recursive https://github.com/spf13/hugoThemes.git themes
 ```
 
 ## Installing a specific theme
 
-    $ mkdir themes
+Switch into the `themes` directory and download a theme by replacing `URL_TO_THEME` 
+with the URL of the theme repository, e.g. `https://github.com/spf13/hyde`:
+
     $ cd themes
     $ git clone URL_TO_THEME
+    
+Alternatively, you can download the theme as `.zip` file and extract it in the 
+`themes` directory.
+
+**NOTE:** Please have a look at the `README.md` file that is shipped with all themes.
+It might contain further instructions that are required to setup the theme, e.g. copying
+an example configuration file.