Documentation
Publicon
Reference
Preferences
Cell Options
Display Options
ShowSelection
• ShowSelection is an option for cells that determines if text in a notebook should appear highlighted when it is selected.
• If you set ShowSelection 
False, editing text becomes difficult because the insertion point and selection are invisible. This option is intended for use in notebooks that will not be edited manually. However, this option does not prevent editing; use Editable False for that purpose.
• The default setting is ShowSelection True.
