I've just bought a new monitor as the old one was dying. It's an AOC Q3279VWFD8 and I've a NVIDIA Quadro 600 Graphics card.
InDesign displayed perfectly on the old monitor, but since plugging in the new monitor everything looks very pixelated. The window comes up much bigger than for Illustrator and PhotoShop (as is the little logo thingy that displays as it's loading) so I guess it's something to do with that. Illustrtaor and Photoshop can be enmarged to fill the screen without loss of sharpness. Even the menu text in InDesign is larger.
Anti-aliasing is enabled in InDesign.
Display performance is set to high quality in InDesign.
I have downloaded the requisite driver under the PC's Monitor Settings.
I've assigned 'High Performance' under the Graphics Specs of Graphics Settings under Windows Settings/Display.
In the NVIDIA control panel/Manage 3D Settings, the settings are shown as in the screen shot: