You should go to Site Template style > Open one template ex: astroid_nika - Default > Article/Blog > Article Layout Builder > Click on "New Layout" to create a new layout for single article.
Prebuilt single article layout.
Assign the Single Layout to categories
After creating a layout for single portfolio article, you should go to Content > Categories > edit your portfolio category > Single Blog Options > Select a template and article layout.
Then articles belonging to this category will inherit the layout you assigned to.
Select a layout for the category.
Edit portfolio article content
Go to Content > Articles > Edit each portfolio article. > Widgets tab > Edit widget's content.
Edit widget's content.
Article's Custom Fields
Portfolio article's custom fields.
To create custom fields, you should go to Content > Fields > Field Group > create a field group.
Then go to Fields > click on New to create new fields.
Choose the field group containing the field.
Choose categories that the field should be assigned to.
Create a new field.
After creating necessary fields, go back to Articles > edit each article > Information tab (name of the field group). > here you can input information of custom fields for each article.
