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In Progress

Under Consideration for 2021.3.X, 2022.2.X, 2023.1.X

Fix In Review for 2023.2.X



Found in





Issue ID




Slow scroll view scrolling when entering Play mode and in Builds



Scrolling is quite slow in Play mode.
We can see that the wheel delta computed by InputSystemUIInputModule is 1/10 of what we have in an EditorWindow.

Reproduction steps:
# Open the user's attached project
# Open Assets > Test scene
# Enter Play mode and scroll Expected result: usual scrolling speed Actual result: slow scrolling

Related fogbugz issue:

  1. Resolution Note (fix version 2023.2):

    UI Toolkit: Users can set the ScrollView's mouse wheel scroll size (thus its speed) with the Mouse Wheel Scroll Size attribute, regardless of its vertical and horizontal page sizes.

Comments (2)

  1. jonas-thefullyarcade

    Jan 17, 2023 15:23

    Not sure if this is the sam problem the is fixed in the Alpha branch, but when scrolling in Android. It looks like the scroll after you release it, uppdates in like 10fps. While checked performance it runs 60fps, so is not a performance problem. Seems like there is a cap in the update for the Scroll Deceleration Rate tick.

    Have tried to get the Alpha up and running to confirm it's fixed, but didn't manage to create a build so gave up.

  2. paxron

    Nov 08, 2022 18:07

    I can confirm in 2022.2.0b13 the scrollview scrolls slowly, even when scroll sensitivity or vertical page size is changed.

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