An InDesign PlugIn to show the no break attribute when showing hidden characters.
The PlugIn has preferences for selecting the highlight colour.
"I like it! Simple, easy to use. No frills functionality. I can see this being very useful when inheriting long documents from another designer, or for when troubleshooting fussy paragraphs that won't behave." --|-- Kelly Vaughn ( document geek )
You can get the InDesign 2025 Macintosh PlugIn here. The link will download a dmg file. Copy the ShowNoBreaak folder to you InDesign PlugIns folder and restart InDesign to install the PLugIn.
The Windows 2025 PlugIn here. To install the PlugIn, download the archive, extract all from the archive and copy the resulting folder to your InDesign PlugIns folder and restart InDesign.