Update README.md

Author: g1eb

README.md

@@ -10,7 +10,6 @@ Converted into an angular directive for your convenience :)
 ## Demo
 Click <a href="https://rawgit.com/g1eb/angular-datetime-range/master/" target="_blank">here</a> for a live demo.
 
-
 ### Datetime range input (collapsed state)
 [<img src="https://raw.githubusercontent.com/g1eb/angular-datetime-range/master/images/start_datetime.png" alt="Angular directive datetime range input - collapsed" width="300px">](https://rawgit.com/g1eb/angular-datetime-range/master/)
 
@@ -47,17 +46,41 @@ angular.module('myApp', [
 <datetime-range start="start" end="end"></datetime-range>
 ```
 
-### Attributes
+## Attributes
 
 |Property        | Usage           | Default  | Required |
 |:------------- |:-------------|:-----:|:-----:|
 | start | Start moment.js datetime object or a datetime string | none | yes |
 | end | End moment.js datetime object or a datetime string | none | yes |
+| presets | Array of preset ranges, click <a href="https://github.com/g1eb/angular-datetime-range#presets" target="_blank">here</a> for more info | none | no |
 | on-change | Handler function that is fired on change of start and/or end datetime objects | none | no |
 | on-change-start | Handler function that is fired on change of start datetime object | none | no |
 | on-change-end | Handler function that is fired on change of end datetime object | none | no |
 | on-close | Handler function that is fired on close of the edit popover | none | no |
 
+## Presets
+
+You can provide any number of preset ranges for quick selection in edit view.  
+
+Consider the following example with ranges of current week, month and year.
+```
+$scope.presets = [
+  {
+    'name': 'Week',
+    'start': moment().startOf('week'),
+    'end': moment().endOf('week'),
+  }, {
+    'name': 'Month',
+    'start': moment().startOf('month'),
+    'end': moment().endOf('month'),
+  }, {
+    'name': 'Year',
+    'start': moment().startOf('year'),
+    'end': moment().endOf('year'),
+  }
+];
+```
+
 ## Dependencies
 
 * [AngularJS](https://angularjs.org/)