Themforest template

i purchased a template from theme forest so, may i able to edit it by my own ?

Yes, definitely you can edit the template according to your need/requirements. You are free to customize the template for your website. Thanks

Ok,but i created a new page as discussed in documentation of ‘"’. but it not shown on sidebar menu.

As far I can understand you have creaed page but didn’t create/customize menu for your new created page. Hope you understand.