Bug: UI is glitchy and slow on high DPI monitors

thanks for posting this!!
Same problem here.
Sitting on a ryzen 3900x with a 2080ti-card on win10. my screens is also a UHK 4k, with 125% display scaling.
and after effects is paaaainfully slow.
If i have to work in ae I have to use my old mac-laptop, which runs fairly smooth

This would have to be my current number one complaint about after effects at the moment. I have found the more layers I add, the slower the UI gets. The slowest part is scrubing through the timeline with the playhead. I have found it gets slightly faster when you turn off the option to see track mattes and the other layer settings however those are important and I dont have time to be turning those on and off.

I think its also important to note this is on a purpose built after effects machine, 9900K, 64gb of ram, 1080, separate ssd just for cache file so its not the cause of a slow machine.

Also I know this is a thread for 4k displays which I currently use, but the UI is still slow on a 1080p display but just not as slow. My only solution at the moment is to keep the layers per comp under around 30-40 which is fine but gets annoying. Sometimes there is just a need to have all your layers in a single comp.

This is a huge issue. Since I got my dual 4K monitors, working on After Effects has become a real pain. Scrubbing through the timeline or selecting keyframes is a nightmare.

Reading other comments, it seems like Adobe directly omits user feedback as long as people keep paying the subscription. Year after year they update minor things and keep on going, but still no proper multithreading, useless UI on 4K...

I suggest everyone to take a look at a new app called Cavalry. It's still far behind AE for professional work (specially for composition) but it has very interesting features for motion graphics. They are constantly listening from user feedback and trying to improve the app. There is a free beta for download at the moment. Also they have plans for supporting Linux, which is awesome. Maybe if everyone of us take a look at it or start using it, Adobe will care more for improving AE. It's time for a new competitor to seriously face Adobe.

It still is a huge issue, and it's making my life miserable each time I have to work on a 4K screen on windows. It went away for a couple of versions, and now it's back with a vengeance. I'd even say it's gotten worse on the last updates of 2020.

I'll chime in and say I probably need medical treatment for the amount of times I've slammed my fist in the desk because of this exact issue over the last 5 years. I remember buying my high end calibrated 4k IPS monitor a week after learning after effects only to see the ui turn into a slideshow. I was in disbelief. Suddenly, every conceivable way of interacting with the software carried a measurable delay. Quickly discovered it's adobes fault. I figured "that's alright, surely they will fix this horrific problem shortly" ... lol.

THIS WAS IN 2015. I've never been able to relieve this issue by messing with DPI scaling or swapping GPU'S, single GPU, none of it.

6850k 6-core, 64GB ram, 2x1080ti running win 10 - Laggy, barely useable, frustrating UI.

random old dell running win8 - No problems. UI is snappy and entirely functional.

I'm glad to see it gaining traction. It's downright shameful on adobes part that they refuse to fix this year after year after year. It's 2020. 4K is a thing. Entire industries depend on this software. We shouldn't have to use 1080p monitors, registry hacks, or use a combination of old drivers and/or software builds to get any relief from this issue.

There's a 1 second lag when drawing a selection rectangle on the timeline for me (1 out of 4 times approximately). I'm using a fairly bulky new mac pro so It's not a performance problem on the side of the hardware. Please consider fixing this !

Hello, I'm on two 4k displays, Xeon Silver 4108, RTX 2080 Super, 32Gb RAM, SSD system drive with Win10. The UI is laggy as ****! When will this be finally resolved, Adobe?? Impossible to work with comfort.

Awful, awful awful! Got a brand new Mac Pro with Dual Vega GPUs and STILL. What’s worse is that this is a problem that spans across the entire creative suite. Lightroom and premiere are just as laggy and slow in the UI. This makes me wanna switch to final cut, sadly for after effects there’s no alternative.
How can we make adobe move on this?

I'm having the same issue on 16.3 build. I've resorted to using the 'hack' described below which gives a After Effects a blurry UI. I would love to see this problem actually resolved.

Can confirm this on the newest 16.3 build. The lag is intolerable. Running a 2080ti with 2970WX Threadripper. Unnacceptable.