Update documentation about options to switch font size and position of the text (#3989)

* update settings section

* fix mistakes

* Update site/content/en/docs/manual/basics/settings.md

* Update site/content/en/docs/manual/basics/settings.md

Co-authored-by: Boris Sekachev <boris.sekachev@intel.com>

site/content/en/docs/manual/basics/settings.md

@@ -37,6 +37,12 @@ In tab `Workspace` you can:
 
   ![](/images/image152_detrac.jpg)
 
+- `Position of a text` - text positioning mode selection:
+  - `Auto` - the object details will be automatically placed where free space is.
+  - `Center` - the object details will be embedded to a corresponding object if possible.
+
+- `Font size of a text` - specifies the text size of the object details.
+
 - `Automatic bordering` - enable automatic bordering for polygons and polylines during drawing/editing.
   For more information To find out more, go to the section [annotation with polygons](/docs/manual/advanced/annotation-with-polygons/).