We have removed in Magnolia 6.2 the possibility to rename the file during the Upload process. (See attached screenshot)

Rename action could be used on Magnolia 5.7 for SEO Reasons. This missing rename option for files generates now for the customer additional workload.

Steps to reproduce

1. go to Dam app
2. upload a new asset or edit an existing one

Expected result

The editor can edit the asset name as it was possible in 5.7

Current behaviour

The editor cannot edit the asset name and if the editor use Asset Name for this, it is not working as expected.

Workaround

A] Edit the asset name before uploading it to Magnolia
B] Using legacy assets app where this option is still available.
C] Hotfix/decorate magnolia-dam-app-jcr/src/main/resources/dam-app-jcr/dialogs/uploadAndEdit.yaml with:

form:
  properties:
    upload:
      ...
    jcr:content:
      $type: compositeField
      itemProvider:
        $type: jcrChildNodeProvider
      properties:
        fileName:
          $type: textField

Development notes

It used to work in Magnolia 5.7. 
When opening using damlink field, the chooser is not displaying the asset name correctly, when it is displayed correctly in dam app.