If you’re logged into Cinode you have a side view on your left side. Click on Reports and then Skills. You will now see a list of skills. On the right upper corner you will find the search choise next to Category, Resource, Team and Group.
If you search for a skill, you will also see which category said skill is under.
If you click on Category and then on Uncategorized, you will see all uncategorized skills. You can now choose to click on Select category next to a skill, to see all available categories. If you hover over the i icon, you will see the category defenition. Choose which category you want your skill to fall under and click on save.