Hello Amitesh Kumar!

For example if you watn to create main help page and subpages will have url like help1, help2 you need:

1) enter to Una studio under operator ([url of your Una site]/studio/launcher.php)

2) choose there app "Pages" ([url of your Una site]/studio/builder_page.php)

3) press button "Add new page"

4) in new popup set up settings of your new page

5) then customize your new page withj "Add new blocks" area

6) create other necessary pages via similar way

Litle more details about you may find here:

https://github.com/unaio/una/wiki/Pages-Builder

Then you need to create menu for new section of your site

7) after pages ready go to studio -> navigation app ([url of your Una site]/studio/builder_menu.php)

8) first of all find there "Site Navigation" point and click on link like "number of elements" ("12 elements" for example).

9) in new page press button "Add new element" and choose setitngs in the appeared popup (url should be of your page/help)

10) find this new element via menu "Sets" and add there all other help pages.

Navigation menu tutorial you may find here:

https://github.com/unaio/una/wiki/Navigation-Builder

With the best regards, Leonid