Tags and mentions
If you simply want to track your projects more granularly, you can easily add tags (#), mentions (@) or simple notes to your entries. These notes then act as searchable sub-categories/sub-activities.
Example
Imagine you’ve been tracking doing research. If you now want to assign this time to Project A, you can just add “@ProjectA” in the notes field of this entry. This entry is now assigned to Project A.

Tip: If you are regularly using the same activities and notes, make sure you add a hashtag (#) or mention (@) before them. This way they will be saved and shown to you in a dropdown menu whenever you start typing # or @.
Filter and analyze data for projects & subprojects
On the Insights tab in the software, you can filter by dates, activities and notes, tags/mentions, and more in order to analyze your time tracking data.

If you have a Personal Pro or Team subscription you can then easily export this data by clicking on the export icon in the top right corner.
How to delete tags and mentions
To delete a tag or mention simply begin to type the tag/mention in the notes field and you’ll see a popup appear with suggestions that match the text you’ve entered. If you hover over the tag in question you’ll see a trashcan icon appear to the right of it. Click on this icon and then click the checkmark and your unwanted tag/mention won’t be cluttering up your list any longer.

You can also click on the edit icon beside the space name and then click on the Tags tab to delete any tags or mentions.

How to edit tags and mentions
Editing a tag or mention works in a very similar way. Begin typing the tag/mention you would like to edit in the notes field and you’ll see a popup appear with suggestions that match the text you’ve entered. If you hover over the tag in question you’ll see a pencil icon appear to the right of it. Click on this icon, make the desired change(s) to your tag/mention, and then click on the checkmark icon to save your change. All previous instances of the edited tag/mention will be updated as well! Once again, you can click on the edit icon beside the space name to edit any tags or mentions as well.

If you change your mind and don’t want to go through with the edit, simply click the “x” icon instead of the checkmark and the change will not be saved.