# Read-Only Notes
Some note types such as Text and Code notes in Trilium can be set to read-only. When a note is in read-only mode, it is presented to the user in a non-editable view, with the option to switch to editing mode if needed.
## Automatic read-only mode
For optimization purposes, Trilium will automatically set very large notes to read-only. Displaying such lengthy notes in editing mode can slow down performance, especially when editing is unnecessary.
This behavior can be disabled on a per-note basis, by following the instructions of the next section.
In addition, it's possible to change the number of characters at which the automatic read-only mode will trigger in Options by going to the options for Text Notes and Code Notes.
## Changing a note's read-only behavior
Via the Ribbon, by going to the _Basic Properties_ tab and looking for the _Editable_ selection. The following options are possible:
* **Auto**
This is the default behavior in which the note will be editable by default, unless it becomes large enough to trigger read-only mode.
* **Read-only**
The note will be always marked as read-only, regardless of its size. Nevertheless, it's still possible to temporarily edit the note if needed. This is generally useful for notes that are not prone to change.
* **Always Editable**
This option will bypass the automatic read-only activation for this particular note. It's useful for large notes that are frequently edited.
If the _Editable_ section is missing from the ribbon, then the note type does not support read-only mode.
### Manually setting the options
Apart from using the ribbon as previously mentioned, it's also possible to use [labels](../../Advanced%20Usage/Attributes.md) to change the behavior:
* To set as read-only, apply the `readOnly` label to the note.
* To disable automatic read-only (always editable), apply the `autoReadOnlyDisabled` label.
## Temporarily editing a read-only note
When accessing a read-only note, it's possible to temporarily edit it by using the  button in the Floating buttons area.
When pressed, the note will become editable but will become read-only again after navigating to a different note.
## Special read-only behavior
Some note types have a special behavior based on whether the read-only mode is enabled:
* Mermaid Diagrams will hide the Mermaid source code and display the diagram preview in full-size. In this case, the read-only mode can be easily toggled on or off via a dedicated button in the Floating buttons area.
* Geo Map View will disallow all interaction that would otherwise change the map (dragging notes, adding new items).