My standard Word template includes paragraph styles used to create to-do lists, like Checkbox and Checkbox - done. Both are bulleted styles, each using a different bullet. (An empty checkbox and a checked one, respectively.)

My requirements are:

• Two item styles (checked and unchecked) with the text indented from the bullet if it wraps across multiple lines
• Items (bullet + text) can be indented to create hierarchy
• An easy, keyboard-compatible way to switch an item from unchecked to checked (macros are fine if need be)
• The item indent will not be lost when switching from checked to unchecked and vice-versa

My problem is the last point. Currently, if a level-3 item (indented twice, i.e. 2 × 0.5") is switched from Checkbox to Checkbox - done, it will lose its indent. (It's easy enough to Ctrl+Alt+] a couple of times to restore the indent, but it's problematic when I select several paragraphs with various indents and mark them complete — manually resetting each item's original indent is error-prone.)

So, how can I implement this to-do list? Thanks!
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I should point out that, although I describe this to-do list as multilevel, I believe I am not using Word's multilevel lists, although the styles were defined years ago, so I'm not 100% sure.

The Checkbox style is described in the Modify Style window as Font: Humnst777 BT, Bold, French (Canada), Indent: Left: 0), Hanging: 0.25", Numbered + Level: 1 + Numbering Style: Bullet + Start at: 1 + Alignment: Left + Aligned at: 0" + Indent at: 0.25", Based on: Normal