UNDOCTL system variable
撤销控制
Specifies the state of the UNDO command. The value is stored as a bitcode using the sum of the values of all selected options.
只读
| Type: | Short |
| Saved in: | Not saved |
| Default value: |
5 |
| Possible options: |
0: Undo off 1: 撤销打开 2: 只能撤销一个命令 4: 自动选项打开 8: 当前活动的组 |