Preparations

In IDE:

1. open /themes/advanced/platform/elements/forms.elm.tpl template for editing
2. for declaration of inp_edit_box block
   1. add default design_name parameter with form_row as value
   2. replace hardcoded form_row occurence with $design_name
3. save changes

Part 1

1. on Front-End:
   1. open homepage of advanced theme
   2. click on Register link in login sidebox
   3. confirm, that page opens without any issues
2. in IDE:
   1. open /themes/advanced/platform/login/register.tpl template for editing
      1. add <inp2:m_DefineElement name="form_row2">AA<inp2:m_Param name="content"/>BB</inp2:m_DefineElement> on top of the template (right after meta comment)
      2. in the 1st usage of inp_edit_box block in the template add design_name="form_row2" parameter
   2. save changes
3. on Front-End:
   1. reload the page in the browser
   2. confirm, that look of 1st form element has changed, but other similar elements remained unchanged