Keepmark has support for spell checking when creating notes. To enable this functionality, you must first go to the app's settings and download the dictionaries of your choice.
In Keepmark you can configure default author for new notes. It can be helpful, when you want to discover if note is created by you, or copied from external source. This operation you can do in Application Settings.
In Keepmark you can add relations for an existing document, to other documents, tasks, or people. This can be done through the side panel of an open document.