diff --git a/ui/button_actions.md b/ui/button_actions.md
index f1817469..f119da9e 100644
--- a/ui/button_actions.md
+++ b/ui/button_actions.md
@@ -1,6 +1,14 @@
 ### Button Actions
 
-When a toolbar button is pressed current controller's `button` or `x_button` method is called. This is tru with the exception of some client-side only actions.
+Toolbar button actions can be server-side or client-side.
+
+Currently most buttons are server-side but the preferred way of writing new
+code is calling the API from client-side button actions.
+
+#### Server-side Button Actions
+
+When a toolbar button is pressed current controller's `button` or `x_button`
+method is called.
 
 The identifier of the button that was pressed is passed in `params[:pressed]`.
 
@@ -12,6 +20,14 @@ The `x_button` or `button` handlers should follow this pattern:
  end
 ```
 
-Meaning that just a lookup in the list of valid actions for the controller is done and the action is called if found. Nothing else.
+Meaning that just a lookup in the list of valid actions for the controller is
+done and the action is called if found. Nothing else.
+
+Cleaning up the handlers to this form will allow us to do furter refactorings
+and make the button actions plugable.
+
+#### Client-side Button Actions
+In [Toolbars and Buttons](toolbars.md#javascript-only-buttons) you can see how to define javascript-only buttons.
 
-Cleaning up the handlers to this form will allow us to do furter refactorings and make the button actions plugable.
+Such button can perform changes in the UI or it can call the ManageIQ REST API
+to get work done. See [Calling the API](calling_api.md).
diff --git a/ui/patterns.md b/ui/patterns.md
index ef746f00..aafcc954 100644
--- a/ui/patterns.md
+++ b/ui/patterns.md
@@ -3,19 +3,22 @@
 This guide aims to provide information that allows a
 quick start for new contributors for the UI.
 
-* [Menus](menus.md)
-* [RBAC Features](rbac_features.md)
-* [Toolbar and Buttons](toolbars.md)
-* [Button Actions](button_actions.md)
-* [Page Layout](page_layout.md)
-* [Trees, Nodes, Accordions](trees.md)
-* [Textual Summaries](textual_summary.md)
+* [Page Layout](page_layout.md) -- basic page structure and elements.
+* [Menus](menus.md) -- menu sections, subsections, menu items.
+* [RBAC](rbac_features.md) -- permission system, verifying acces to features and items.
+* [Toolbar and Buttons](toolbars.md) -- how to define toolbars and toolbar buttons.
+* [Button Actions](button_actions.md) -- how to react on button presses.
+* [Textual Summaries](textual_summary.md) -- entities' details, relations, properties.
 * [Listnavs](listnav.md)
+* [Trees, Nodes, Accordions](trees.md)
 * [GTL -- Grid, Table, List](gtl.md)
-* [Calling the API](calling_api.md)
 * [Running through the Queue and Busy Waiting](queue_wait.md)
 * [Quadicons](quadicons.md)
 * [Reports and Charts](reports_charts.md)
 * [Topology](topology.md)
 * [Remote Consoles](remote_consoles.md)
 * [Angular Components](angular_components.md)
+* [Calling the API](calling_api.md) -- how to call the API from the client-side.
+
+To write new Javascript components for ManageIQ e.g. in Typescript and Angular, please, read
+* [UI Components Readme](https://github.com/ManageIQ/ui-components/blob/master/README.md)
diff --git a/ui/rbac_features.md b/ui/rbac_features.md
index 00f2c2f8..d15f8094 100644
--- a/ui/rbac_features.md
+++ b/ui/rbac_features.md
@@ -10,4 +10,16 @@ RBAC checking is done for every action and every button in `check_privileges`
 in `ApplicationController`. Therefore each button, each menu item and each
 screen needs to have its RBAC feature.
 
-More detailed RBAC checking is done in individual actions both in the UI and the API.
+### Checking permissions on individual items
+
+More detailed RBAC checking is done in individual actions both in the UI and
+the API. In `CheckedIdMixin` you can find methods that fetch and verify access
+to items selected in the UI.
+
+Example below fetches cloud volumes whose IDs are either passed in as checked
+items from a GTL view or in `params[:id]`.
+
+
+```
+  volumes = find_records_with_rbac(CloudVolume, checked_or_params)
+```
diff --git a/ui/toolbars.md b/ui/toolbars.md
index 0c6ea14f..c8467bae 100644
--- a/ui/toolbars.md
+++ b/ui/toolbars.md
@@ -40,7 +40,7 @@ class ApplicationHelper::Toolbar::VmCloudsCenter < ApplicationHelper::Toolbar::B
 
 ### Buttons
 
-Toolbars consist of button groups and button groups consist of buttons. 
+Toolbars consist of button groups and button groups consist of buttons.
 
 There are 3 types of buttons:
 
@@ -64,7 +64,7 @@ In toolbar definitions text and hover text need to be marked for translation wit
 instance variables are present and can be used to determine the values of the
 texts.
 
-Furher values have to be passed in as hash. In the example above it is
+Further values have to be passed in as hash. In the example above it is
   * `:url\_parms`,
   * `:confirm`,
   * `:enabled`,
@@ -72,7 +72,7 @@ Furher values have to be passed in as hash. In the example above it is
 
 Very important key is
   * :`klass`.
- 
+
 Toolbars are rendered into JSON by the ManageIQ and then processed by toolbar component from the [ui-components repository](https://github.com/ManageIQ/ui-components)
 
 #### Button details
@@ -91,16 +91,47 @@ etc. has particular **feature**.
 
 Example usage:
 ```ruby
-button(                                                                                     
-  :vm_collect_running_processes,                                                            
-  'fa fa-eyedropper fa-lg',                                                                 
-  N_('Extract Running Processes for this VM'),                                              
-  N_('Extract Running Processes'),                                                          
-  :confirm => N_("Extract Running Processes for this VM?"),                                 
-  :klass => ApplicationHelper::Button::GenericFeatureButtonWithDisable,                     
-  :options => {:feature => :collect_running_processes}),    
+button(
+  :vm_collect_running_processes,
+  'fa fa-eyedropper fa-lg',
+  N_('Extract Running Processes for this VM'),
+  N_('Extract Running Processes'),
+  :confirm => N_("Extract Running Processes for this VM?"),
+  :klass => ApplicationHelper::Button::GenericFeatureButtonWithDisable,
+  :options => {:feature => :collect_running_processes}),
 ```
 
 The feature to be tested is passed in the :options hash as :feature. All
 content of the :options is passed to the Button classes and can be used to
 parametrize generic button classes.
+
+### Javascript-only buttons
+
+You can create buttons that don't need a client--server roundtrip when pressed. Such buttons instead call some javascript function, talk to Angular components or send RxJS messages to perform their action.
+
+Example of such button definition:
+```
+  button_group('middleware_server_operations', [
+    select(
+      :middleware_server_power_choice,
+      'fa fa-power-off fa-lg',
+      t = N_('Power'),
+      t,
+      :items => [
+        button(
+          :middleware_server_shutdown,
+          nil,
+          N_('Gracefully shut this server down'),
+          N_('Gracefully shutdown Server'),
+          :image => 'guest_shutdown',
+          :data  => {'toggle'        => 'modal',
+                     'target'        => '#modal_param_div',
+                     'function'      => 'sendDataWithRx',
+                     'function-data' => '{"type": "mwServerOps", "operation": "shutdown", "timeout": 0}'},
+          :klass => ApplicationHelper::Button::MiddlewareStandaloneServerAction),
+...
+```
+
+Under `:data` you need to set 2 important keys:
+  * `:function`, defines javascript function to be called when the button is pressed,
+  * `:function-data`, defines arguments to be passed to the function.