Editing almost any type of content in a Moodle course works in the same way. The basic steps are:
1. Click the Turn editing on button at the top right of the screen
2. Click the three dots menu to the far right of the item you would like to edit
3. Select the Edit settings option from the drop-down list
4. Make any edits or changes that you would like to make
5. Click the Save or Save and return to course buttons at the bottom of the page