You can archive your invoices by selecting them in your list and by clicking on Actions > Archive. This will also automatically archive the jobs linked to these invoices.
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There is also an option 'Archive invoice and related jobs' when you click on the three dots at the end of the line of each invoice in your list.

You can access your archived items by clicking on 'View archived invoices' at the bottom of your list of invoices.

To unarchive an invoice, you can click on 'View archived invoices' at the bottom of your list of invoices, select the invoice you would like to unarchive and click on Actions > Unarchive. Again, the Unarchive option is also available when you click on the three dots at the end of the line of each invoice in your list.

SCREENSHOT

You can archive your invoices by selecting them in your list (under Accounting > Invoices) and clicking on the arrow > Archive selected invoices. You can also choose to archive in one click one or several invoices and all the jobs they contain.
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You can then access your archived items by clicking on the Archived link at the bottom of your list of invoices.

To unarchive an invoice, you can go in the Archived view of your list of invoices (see screenshot above), select the invoices you would like to unarchive and click on the arrow > Unarchive selected invoices.