Text or code can be set to be read-only. In such case only read view is presented to the user with the option of editing the note if needed.

You can set the note as read only by adding label readOnly.

If the note is too large then Trilium will automatically set the note as readOnly as an optimization - displaying such long notes can take a long time in editing mode and this might unnecessarily slow down operation even if editing is not necessary.

If you want to keep specific note automatically editable, you can add label autoReadOnlyDisabled.