Here's how to edit a Skill:
Using the left side navigation menu, scroll to your organisation's name, then hit 'Skills'
You'll see a list of all the Skills in use across your organisation
Find the Skill you want to edit and click the ellipsis '...' menu
You can edit the following settings at Skill level:
Skill name - the name of the Skill
Skill description - A summary of what the Skill is
Image - Choose an image to represent the Skill
Skill levels - Add or remove levels for the Skill
Skill level descriptions - Amend the description for each Skill level
Skill level examples - Amend the examples for each Skill level.