To-Do List: Completed Items

[enyde]

Title
To-Do List: Completed Items

Short, concise description of the idea
When revising your To-Do list function, I would really like to see a feature added that strikes through or greys out completed items.

Full description of the idea
I love the idea of the to-do list, it just needs the ability to keep track of finished tasks, yet have them be clearly delineated from active tasks.
An ordered list of benefits

• Perhaps it would be great to be able to view only incomplete tasks OR completed OR both. But I realize that's getting complicated.

An ordered list of problems/issues involved

• More work to write I imagine, but it would be very useful to users like me.