Rephrase docs for Content Selectors (#463)

en/advanced/contentselector.md

@@ -1,8 +1,12 @@
 # Field content selector
 
-This feature is accessible via **Library → Library properties → Manage content selectors** and allows you to store a selection of often-used words or phrases that you use often in your database. By default it is enabled for the fields _Journal_, _Author_, _Keywords_ and _Publisher_, but you can also add selectors to other fields.
+The preferences for this feature are accessible via **Library → Library properties → Content selectors** and allows you to store often-used words or phrases. This creates the possibility to conveniently make use of them in the entry editor to fill in field content.
+
+To add a new word by using the content selector in the entry editor, you can simply click into the text box for the field for which you configured the selectors. A drop down menu will appear and you can select the keyword of your choice. This mechanism is based on the [autocompletion](https://docs.jabref.org/advanced/entryeditor#word-name-autocompletion) functionality in JabRef (**File → Preferences → Autocompletion**) . Therefore, you need to have autocompletion enabled in your preferences.
+
+By default, the feature is enabled for the fields _Journal_, _Author_, _Keywords_ and _Publisher_, but you can also add selectors to other fields.
+
+The word selection is library-specific, and is saved along with your references in the .bib file.
 
-The word selection is database-specific, and is saved along with your references in the .bib file.
 
-To add a new word in the entry editor, you can simply click into the text box for the field for which you configured the selectors. A drop down menu will appear and you can select the keyword of your choice. This mechanism is based on the autocompletion functionality in JabRef. Therefore, you need to have autocompletion enabled in your preferences.