Islandora allows you to edit the metadata created for an object without having to upload an entirely new metadata datastream. This tutorial will show you how to find and make changes to an object's metadata datastream.
This will bring you to the object's management page.
This will bring you to the object's list of datastreams.
(Due to its size, the above screenshot has been turned into a thumbnail. Click on it to zoom in)
This will take you to that datastream's form.
Only datastreams created through a form made using Islandora's Form Builder will have an 'edit' button listed beside them. You can check these forms at Islandora > Form Builder (admin/islandora/xmlform). By default, a MODS record for each of the standard Islandora Solution Packs will have been created via one of these forms. If there is no 'edit' button, you can download the existing datastream, edit it off-line, and upload it again.
4. If more than one form is associated with the content model being used, select the form you wish to use for this object
If more than one form is associated with the content model assigned to this object, a dialog box will appear asking you to choose which form you would like to use. Select a form and click "Next." this will take you to that metadata datastream displayed in your chosen form.
To associate multiple forms with a content model, navigate to http://path.to.your.site/admin/islandora/xmlform and click on the 'Associate' button beside the form you wish to add to the content model. More information on how to do this can be found in How to Edit/Create Ingest Forms.
This will vary from form to form and content model to content model. In this case, we are going to add a Description to the example object. Complete the changes and click on the 'Submit' button at the bottom.
Changes to the object's metadata are now visible on the object's page.