Inline Record Edit Mode
When the Inline Edit mode is enabled for the view, the New and Edit buttons change their behavior to render edit controls right into the page. A user can either Cancel the editing session or change the data and press Save to update the record.
Regarding : when a reference column is created, a proxy lookup column is shown in a by default. So, the lookup refers to the . If the Inline Edit option is activated in the View and when a user clicks on the Edit button in such view, the proxy lookup column is replaced with a .
However there are some limitations: are not supported; View’s subtotals/grand totals and master record data that depend on edited values are not updated at the moment; Simultaneous editing conflicts are reported but there is no other way to resolve them but cancel edit.