| # Freeze | |
| This extension allows to make cells read-only or frozen. It provides three buttons: | |
| * unlock | |
| * read-only | |
| * frozen | |
| For **code-cells**:<br> | |
| _read-only_: it can be executed, but its input cannot be changed.<br> | |
| _frozen_: It cannot be either altered or executed. | |
| For **markdown-cells**:<br> | |
| _read-only_: It's input can be viewed by double-clicking on it, but cannot be changed.<br> | |
| _frozen_: Input cannot be viewed by double-clicking. | |
| To change the state of a selected cell, press the corresponding button. | |
| The individual cell's state is stored in its metadata and is applied to the cell if the extension is loaded. | |
| ## Internals | |
| The _read-only_ state is stored in the `cell.metadata.editable` attribute. Cells are editable by default. | |
| The _frozen_ state is stored in the `cell.metadata.run_control.frozen`attribute. | |