Outline notes are one of the oldest and most effective note-taking formats — and one of the most underserved on macOS. Apple Notes has basic indentation. Most note apps treat hierarchy as an afterthought. Dedicated outliners like OmniOutliner are powerful but live in their own windows, disconnected from your desktop workflow.
DeskMemo's Outline Note is different: a purpose-built hierarchical outliner that floats on your Mac desktop, stays visible while you work, and syncs via iCloud. Here is everything you need to know about outline notes on Mac.
What Are Outline Notes?
An outline note is a hierarchical note format where every item can have sub-items, and those sub-items can have their own sub-items — forming a tree structure with no depth limit. Unlike plain text, outline notes make parent-child relationships explicit and navigable.
Outline Notes at a Glance
| Best for | Project plans, research, meeting agendas, structured thinking |
|---|---|
| Key feature | Unlimited nesting — items can have children, grandchildren, and beyond |
| vs. plain text | Structure is explicit, collapsible, and reorderable |
| vs. Canvas notes | Linear top-to-bottom hierarchy vs. freeform spatial layout |
| DeskMemo Outline | Floating desktop note, iCloud sync, per-row file attachments |
Outline notes are ideal when the information you are capturing has a natural parent-child structure — project phases with tasks underneath, research topics with sub-topics, meeting agendas with action items. The hierarchy makes relationships visible and collapsible sections let you focus on one part without losing the rest.
How to Create an Outline Note in DeskMemo
- Create the note — click the DeskMemo icon in your menu bar and select "New Outline Note". A floating outline note appears on your desktop ready to type.
- Add your first item — click any row and start typing.
- Add a new row — press Return to create a new row directly below.
- Nest an item — press Tab to indent the current row, making it a child of the row above.
- Outdent an item — press Shift+Tab to move it back up one level.
- Reorder items — drag any row by its left edge. The entire subtree moves with it.
Key Features of DeskMemo Outline Notes
Unlimited nesting depth
There is no limit to how deep you can nest items in DeskMemo's Outline Note. A project can have phases, phases can have tasks, tasks can have sub-tasks, sub-tasks can have notes — as many levels as your structure requires.
Collapsible sections
Click the chevron (▶) to the left of any row that has children to collapse it and hide all its sub-items. This lets you focus on one section of your outline without deleting or moving anything. Expand it again with another click.
Per-row file attachments
Every row in a DeskMemo Outline Note can have its own file attachment — an image, PDF, video, Word document, Excel spreadsheet, and more. Drag a file from Finder directly onto a row, or use the Attach File button in the control bar. The attachment appears as a collapsible card beneath that row.
Annotations
Each row has a secondary annotation field — a smaller, dimmer line below the main topic. Click the Annotation button in the control bar to show it for the selected row. Use it for extra context, links, or details without cluttering the main outline structure.
Completion tracking
Click the circle to the left of any row to mark it complete. The row shows a strikethrough. Click again to unmark it. Completion state is separate from deletion — completed items stay in your outline until you choose to remove them.
Rich text formatting per row
Use the Format (Aa) button in the control bar to apply bold, italic, text colour, highlights, and font size to selected text within any row. Formatting is per-row and stored with the note.
Inline hyperlinks
Select text in any row, click the Link button in the control bar, and paste a URL. It becomes a clickable inline hyperlink within that row — useful for referencing sources, documentation, or related pages.
Who Should Use Outline Notes
Project managers
Structure projects as top-level items with phases, milestones, and tasks nested underneath. Collapse completed phases to keep the outline focused on active work. Attach briefs or specs to the relevant row.
Researchers and students
Build a research tree with topics, sub-topics, and sources. Attach PDFs or images to the row they support. Use annotations for quotes or page references. Collapse sections you are not actively working on.
Writers and content creators
Structure articles, scripts, or books as an outline before writing. Each H2 becomes a top-level row, H3s become children. Attach reference images or competitor examples to the relevant section. Reorder sections by dragging rows.
Meeting note-takers
Create an outline before the meeting with agenda items as top-level rows. Add sub-items as discussion points arise. Mark action items complete as they are assigned. The outline stays visible on your desktop during the meeting.
Outline Notes vs. Other Note Types in DeskMemo
| Feature | Outline Note | Text Note | Canvas Note |
|---|---|---|---|
| Structure | Hierarchical tree | Free-form text | Spatial freeform |
| Best for | Plans, research, agendas | Quick writing, reference | Visual thinking, projects |
| Nesting | Unlimited levels | Manual indentation | N/A (blocks) |
| File attachments | Per row | Inline | Per block |
| Reordering | Drag rows | Cut/paste | Drag blocks |
| iCloud sync | ✓ | ✓ | ✓ |
Frequently Asked Questions
What is the best outline notes app for Mac?
DeskMemo is the best outline notes app for Mac for users who want hierarchical notes always visible on their desktop. It supports unlimited nesting, per-row file attachments, annotations, collapsible sections, and drag-to-reorder — all in a floating window that stays on screen while you work.
Does macOS have a built-in outliner app?
macOS does not include a dedicated outliner. Apple Notes supports basic indentation but not a true hierarchical outline structure. DeskMemo's Outline Note is a purpose-built hierarchical outliner for macOS with unlimited nesting and iCloud sync.
What is the difference between outline notes and regular notes?
A regular text note is an open-ended rich text editor — like a word processor. An outline note is purpose-built for hierarchical lists: every line is a discrete row with its own nesting level, completion state, annotation, and optional file attachment. Use a text note for writing; use an outline note for structured information with parent-child relationships.
Can I attach files to individual outline items?
Yes. In DeskMemo's Outline Note, each row can have one file attachment — an image, PDF, video, Word document, Excel spreadsheet, and more. Drag a file from Finder directly onto a row or use the Attach File button in the control bar.
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