The line symbol library selector supports further editing of line symbols in workspace resources to meet new requirements. When editing line symbols in the library:

1. First, select the target line symbol in the line symbol library selector;
2. Then, click the Edit button in the selector; or double-click the left mouse button on the target symbol to open the linear symbol editor. The relevant attributes of the selected symbol (including attributes and sub-lines) will be displayed in the editor. You can then use the editor's functions to modify the symbol as needed. After editing, click the OK button. For detailed instructions on using the linear symbol editor, please refer to the Linear Symbol Editor guide.
3. After completing edits in the editor, click the OK button to confirm changes.

Edits made to line symbols in the library will only be permanently saved after either saving the symbol library file or saving the workspace containing the symbol library resources.