How to edit office documents in nextcloud 18.0.1

Do you know how to edit office documents with the Documents application in nextcloud 18.0.1?
I’m using the latest version of nextcloudpi

thank you very much

You need OnlyOfficeDocumentServer, there is no support for Arm afaik. :cry:
I installed it on an old HP z220 i5 4core with 8 Gb ram using docker, following instructions from :sunglasses:

thank you for your response
I have a Raspberry Pi, so I couldn’t install it.