To edit the border of any component:
- Right-click on the component to access its context menu
- Open its general Style setting
- Find the Border setting
- Optionally, disable Apply to all borders for controlling each border separately
- Then choose the style of border from the dropdown (default is solid)
- Change the color of the border(s)
- Use the input field or the range input to change the border width. The input field allows you to set values beyond the limit of the range.