-Open shop in shopfactory

-On the left tree, select the page/department that you want to change the ID

- “Edit Page” from Toolbar and click Properties button

- Select SEO DETAILS from left tree and locate Page Filename. You can enter the name there so it will appear something like D1_mypagename.html

IMPORTANT: D1 (department number) can't be deleted or removed.

- Click OK -> Finish

- Enable Rebuild All -> Save and Preview the shop to external browser

- Re-publish the shop with Publish All enabled