The solution posted by @Brandon YIP does work. If I don't open InDesign on the second (now Main) display, the cursor is now too small, so I will have to always work on InDesign using the second display, which is fine. To test it, I unplugged my second monitor, and the cursor size is acceptable on my laptop screen as long as the second monitor is not hooked up. I feel like there needs to be a permanent solution from Adobe, however, not just a work-around.

@Agha Azerbaijan It worked! Thanx!

@BRANDON YIP, this worked for me as well, thank you!

This one worked for me! Just make sure to close InDesign and reopen it post adjusting the "Main display".

I'm having the same issue! Tried the fixes on the threads below, but nothing has helped.

Any fix available for this issue yet?

I have found simple solution. In my situation: Primary screen is my laptop, and secondary screen is another monitor. Laptop screen Scale and Layout (in display settings) is set to 200%.
What you need to do is to select "make this my main display" option for second monitor and make sure that Scale and Layout (in display settings) for second monitor is set to 100% . That will fix the issue. Good luck!

Had this same issue with my InDesign on my external monitors and found this solution online that worked for me:

https://community.adobe.com/t5/indesign/why-is-the-mouse-pointer-huge-in-indesign/td-p/6950308

So I just ran into this problem and noticed that my laptop updated while asleep and stopped connecting to my external monitors. When I reconnected (unplug dock from USB and plug it back in), I got a message about letting windows adjust screen resolution.

I clicked out of it and didn't think anything of it as I've never needed to do anything like that before.

Since I had this problem I was playing around with the display settings and found the below to work. I have a Dell laptop running windows 10.

Close out of InDesign-->Right click on the desktop and choose display settings--> scroll down to 'Scale and layout' and underneath the (possibly grayed out) dropdown menu labeled, 'Change the size of text, apps, and other items' click on 'Advanced scaling settings--> in here, turn on the toggle button for, 'Let Windows try to fix apps so they're not blurry'

That's all I did and fortunately it worked for me. Good luck.

Same issue here. Surface Book 2, using an external monitor connected through Surface Dock. All updates installed, current firmware across the board including on Dell Ultrawide Monitor.

I found this

https://forums.adobe.com/thread/1860200.
Worked perfectly for me for the cursor... though it reduced everything else. I suppose Adobe will have to address this problem at one point...

I found this

https://forums.adobe.com/thread/1860200. Worked perfectly for me for the cursor... though it reduced everything else. I suppose Adobe will have to address this problem at one point...

Same problem here.

I'm having the same issue. I'm using Create Cloud InDesign and it is up-to-date as of 8/24/2018. I'm on a Windows 10 OS on a Microsoft Surface Pro laptop. I have not switched over to touchscreen mode, so I know that is not the cause. But didn't know if anyone found it went away after a while??? I hope so.

same problem

I am having the same issue and none of the proposed "fixes" help with the problem.
HELP!!!!

I'm also having this issue, although I can't understand why there is not a fix, the main thread has been around since 2015 - https://forums.adobe.com/thread/1715918

I'm having the same issue, has anyone been able to resolve this?

I'm using a dual monitor setup from my laptop. This happens on the external monitors (I have 2 external monitors). It does not happen on the laptop screen itself. I have tried adjusting the settings for UI Scaling but had no effect.

I'm using Adobe InDesign 13.1 x64 on Windows 10 Professional.

I am also having this problem, although it may have coincided with a cat-on-keyboard related incident and so still exploring hotkey options.

Have found numerous queries about this problem online but no solution within InDesign.