# Sub-notebooks
UpNote allows you to organize your workspace with sub-notebooks, creating a clear hierarchy for structuring projects, journals, research topics, or any large collection of notes. You can create new sub-notebooks or move existing notebooks under a parent notebook.
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### On Desktop (Mac, Windows, Linux)
#### **Create a Sub-notebook**
You can create a sub-notebook in two ways:
**Method 1: From the Sidebar**
1. Right-click the notebook you want to use as the **parent**.
2. Select **New Sub-notebook**.\
3. Fill in the details for the new sub-notebook.
**Method 2: From the Notebook Creator**
1. Click the **＋** icon next to the **Notebooks** label in the sidebar.
2. Enter the notebook details.
3. Choose a parent notebook from the **Parent Notebook** dropdown.\
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### On Mobile (iOS & Android)
#### **Create a Sub-notebook**
You can create sub-notebooks in two ways:
**Method 1: From the Parent Notebook**
1. Open the parent notebook's note list.
2. Tap the **More (⋯)** button in the lower-right corner.
3. Select **＋ New Notebook**.\
4. Fill in the details for the sub-notebook.
**Method 2: From the Notebook Creator**
1. Tap the **＋** icon next to the **NOTEBOOKS** label in the sidebar.
2. Enter the notebook details.
3. Tap the **Add to notebook** section.
4. Select a parent notebook.
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### Change a notebook’s parent notebook
You can move an existing notebook under another notebook, change its parent notebook, or remove it from a parent notebook at any time.
#### On Desktop (Mac, Windows, Linux)
**Change the Parent Notebook**
1. Right-click the notebook you want to edit.
2. Select **Edit Notebook**.
3. Choose a new parent notebook from the **Parent Notebook** dropdown.\
**Remove a Notebook from Its Parent**
1. Edit the notebook.
2. In the **Parent Notebook** dropdown, select **Notebooks** (the top-level group).
3. The notebook will return to the main notebook list.
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#### On Mobile (iOS & Android)
**Change the Parent Notebook**
1. Open the notebook you want to edit.
2. Tap **Edit** (or the **⋯** menu).
3. Select the new parent notebook.
**Remove a Notebook from Its Parent**
1. Edit the notebook.
2. In the **Parent Notebook** dropdown, select **Notebooks** (the top-level group).
3. The notebook will be moved back to the main notebook list.
***
### Expand/collapse all sub-notebooks in the sidebar
On desktop, you can expand or collapse all sub-notebooks in the sidebar. Simply right-click on the Notebooks section title and select “Expand sub-notebooks” or “Collapse sub-notebooks.”
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### Arrange sub-notebooks in the sidebar
1. Open the **parent notebook** to view its nested notebooks in the notes list panel.
* If nested notebooks don’t appear, go to **Settings → General** and enable **Show nested notebooks in the notes list**.
2. Drag the nested notebooks **up or down** in the notes list panel to reorder them.\
\
3. The new order will automatically be reflected in the sidebar.
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