<p>Within a spring webflow, i need to implement a navigation bar that will allow to "step back" or resume the flow to one of the previous view.</p>

<p>For example :</p>

<ul>
<li>View 1 = login</li>
<li>View 2 = My informations</li>
<li>View 3 = My messages</li>
<li>View 4 = Close session</li>
</ul>

<p>For this example, i would like to return back to view 2 from the view 4 page.</p>

It depends how you're going about doing this.  If you're doing this within a single flow, you'll have something like this:
```
```
<view-state id="loginView" view="login.jsp">
    <action-state bean="someBean" method="login" />
    <transition on="success" to="informationView" />
</view-state> 

<view-state id="informationView" view="information.jsp">
    <render-actions>
        <action-state bean="someBean" method="retrieveInformation" />
    </render-actions>
    <transition on="forward" to="messageView" />
    <transition on="back" to="loginView" />
</view-state>

<view-state id="messageView" view="message.jsp">
    <render-actions>
        <action-state bean="someBean" method="retrieveMessage" />
    </render-actions>
    <transition on="forward" to="closeView" />
    <transition on="back" to="informationView" />
</view-state>

<view-state id="closeView" view="logout.jsp">
    <transition on="jumpBack" to="informationView" />
</view-state>
```
```
The "jumpBack" transition on "closeView" will jump you back to view state #2, which is your information view.
With sub-flows it is tricky.  You'd need to chain it: call a subflow, and if an event is signaled that states you need to end your flow with a specific state, immediately do so.
For example, say that your flow chain is login->information->message->close.
On the close flow, the end-state would be "returnToInformation".
The message flow has a transition on="returnToInformation" to="returnToInformation".
"returnToInformation" is also an end-state in the message flow.
Then, the information flow has a transition on="returnToInformation" to="displayInformationPage", which would then re-display the information page.