Resolve 17.0b8 FusionFX - 'MagnifierFX'
I recently did a video tutorial for Mixinglight.com explaining how Fusion macros can now be used in Resolve's Edit Page as FusionFX. Good news that now, since Resolve 17.0beta 8, you can just add a .setting file to the Effects folder and get immediate access to the FusionFX without the need to restart Resolve.
Here's a Magnifier effect for you. You'll need to change the file extension from .txt to .setting and copy it to the Effects folder (C:\Users\YOUR_SDER\AppData\Roaming\Blackmagic Design\DaVinci Resolve\Support\Fusion\Templates\Edit\Effects). Don't forget to turn on the FusionFX overlay so that you can manipulate the on screen controls.