You’re running an application on a PC with a high DPI display and some (or all) of the controls are too small. You do not want to change the system-wide scaling settings just to make this application more usable.
The solution: Change the app’s high DPI setting
Windows 10 allows you to change the high DPI settings for each application.
Open the application.
Right-click on the app icon in the taskbar.
Right-click on the app’s name.
If this method does not work, locate the application’s folder and right-click on the application file (.exe), then select Properties.
Select the Compatibility tab.
Click on Change high DPI settings:
Check the Override high DPI scaling behavior checkbox and select a new setting from the drop-down list:
Confirm both open dialogs with OK.
“System” should solve the issue of some controls being smaller than others), though the app will look a bit blurry. “System (enhanced)” will try to make everything look more crisp. You might want to try out all settings (and you may have to restart the app to see any changes).
When my ancient Logitech G500 mouse stopped working properly, I followed these helpful instructions to bring it back to life. Now I know more than I ever wanted to know about the mechanics inside the Omron D2FC-F-7N microswitch.
Here’s a short video I made showing how it should work:
This is a photo of a working switch:
The following switches will not work as the leaf spring is not positioned correctly in one of the notches:
I recommend opening the switch from this side (compare label on your switch for orientation):
Finally, a photo with my finger shows why these are called microswitches (actually Omron uses the term “Ultra Sub Miniature Basic Switch”):
I was only able to repair my mouse because I had another broken one from which I stole a leaf spring (from the less-used right switch). The original spring of the left switch in my mouse was badly deformed. Unfortunately I can’t show you any pictures because it flew away when I tried to bend it.
I then searched for the product directly on the 2direct.de website, found it here, clicked on “Downloads”, then on “Treiber AU0033” (Treiber is German for driver), which led to a PDF document that in turn contained the link to the actual driver ZIP file (which is hosted on the LogiLink website where I started).
Note if you’re reinstalling the driver
You can find an uninstaller under “Logilink AU0033 8x seriell\CD\Driver\Windows\64X\9710_7840_QUADPORT_MSUninst.exe”, running this before the installer fixed a problem on my system where only half of the ports would appear.