while at the tab the scale displays as 100%, the bottom is 80%.
Hi @Zunyi Wang , I don‘t think the Title bar and the info in the lower left corner should be showing different magnifications. Have you tried clearing your Caches folder, and if that doesn’t work resetting your preferences?
InDesign’s 100% view on the main monitor should represent the print output at 100%—if you measure rulers at 100% magnification with a physical ruler, 1" should measure as 1". For InDesign to display the correct magnification it has to get the monitor’s info and scaling info from the OS, and it looks like that doesn’t always work. See this thread:
https://community.adobe.com/t5/indesign-discussions/indesign-scale-incorrect/td-p/13441812/page/2
InDesign has a hidden preference for setting a custom display resolution, which can only be accessed via scripting. The script I posted in the above link displays what the system is reporting as the display resolution and lets you set any custom res. The script is here:
https://assets.adobe.com/public/51f617ff-7859-4527-72bc-77da4c408840

Thank you, Rob
The scripting is working and my app ended up using 102 as the custom resolution. For the different view percentage problem, I tried resetting the preferences (by removing the "indesign defaults" file from the en_US folder) but to no avail, the bottom and the tab still are showing different numbers, and they change as I change my ui scaling in the system. However I've found that the top number is the true number since it sets to 100% when I choose "actual size" option in the view tab.