With version 23, we implemented a new feature in our Web Client which allows you to easily create a new item for a certain field.
When clicking a dropdown field, like the End Customer Party in Sales Order, the three points button for opening the dropdown menu visualize the Create New option.
Upon clicking it, the respective form for the field type opens up and allows a record creation. The new form appears in the breadcrumb as a subitem of the current.
Once the Save button is clicked, the system returns to the main form with the created record filled in.