Node properties panel missing in compositor In the compositor, there is the properties panel which allows us to change properties of the nodes added.
It is usually retracted and indicated by a small triangle on the top right, as indicated on the image below.  But it seems to be missing in this particular blend file ( I work with many blend files and this is the first case ive encountered)
How do I enable the panel? The blender version I use is 2.9
Try this:
Delete the Compositing tab up the top:

Add a new Compositing tab:

Fixed!

Bonus: You can shuffle tabs around with Reorder to Front to get them back to where they were:

Here's your .blend back again: