Nesting a command-新手请教

暖色系

nesting a comman是什么意思啊？

下面是virtuoso的user guide里的一段话，有点不明白Nesting commands的作用是什么，小弟新手，哪位高人能指点迷津吗？

Nesting Commands
You can pause before completing one command to perform a second command. This is
called nesting a command. You can nest any command that does not automatically repeat
inside any other command.
1. Choose Edit – Move (to move an object across the cellview).
2. Choose Zoom – Out by 2 (to zoom out the cellview display).
You are now nesting the Zoom command while using Move.
3. Finish the Move command (click to move the object, or press Escape to cancel).
You can nest up to 20 commands. To set the number of commands you can nest,
1. In the CIW, choose Options – User Preferences.
2. Set the Nest Limit field to the number you want.
3. Click OK.

p123qq

应该是指可以记忆多少命令吧
我也菜
不知对否？