Step 1: Navigate to your Fixed Asset details screen by selecting the asset from the summary list.
Step 2: Select the Fixed Asset you want to edit the details of.
Step 3: In the details page for that particular Fixed Asset, select 'Edit' from the top right corner.
Step 4: You will be shown the same side window as when creating a Fixed Asset and can edit the relevant fields, click 'Save Fixed Asset' once edits are completed to ensure these are saved.