do not follow cursor and viewport

[chenbimo]

Is your feature request related to a problem? Please describe.

i hope i can see all the outline，becase it can make me more global outlook

我希望我可以查看所有的大纲，因为它可以让我保持对页面的全局把握

Describe the solution you'd like

just setup a switch,that i can toggle it follow cursor and viewport or not follow cursur and viewport.

只需要设计一个开关，我可以切换它来控制是否跟随光标和视窗或者不跟随光标和视窗

Alternatively，provide the third option is "none"，that i can choose it to not follow cursor. 或者，提供第三个选项“none”，我可以选择这个选项，避免光标跟随

Describe alternatives you've considered A clear and concise description of any alternative solutions or features you've considered.

Additional context Add any other context or screenshots about the feature request here.

[Gerrnperl]

Completed. [v0.6.1] Now you can 📌 the outline