Photoshop 2020 Concertina effect on Mac

[photofan731]

I wonder if you may be able to help me with a problem in photoshop 2020 that has happened today.

All was working fine until this afternoon I think I accidentally must have hit some sort of key board shortcut 

which made a ‘concertina effect’ I cannot get rid of!!

Here is a screen shot of the effect below. It moves in and out when I try to zoom in and out

I have tried shutting everything down but it still remains.

Thanks 

Chris

{Thread title edited by moderator}

[nikunj.m · Accepted solution]

Hi Chris,

We're sorry about the trouble with Photoshop. Would you mind sharing the exact version of Photoshop you are using along with your computers macOS version?

You can try disabling Legacy Compositing from Photoshop by going to the Preferences, then Performance. Once done, quit and relaunch Photoshop to check if that helps. You can also try to reset the preferences of Photoshop using the steps mentioned here: https://adobe.ly/2Qzc0K3

Please backup your settings prior to resetting the preferences. You can check: https://adobe.ly/2vNz6FG

Let us know how it goes!

Regards,

Nikunj

[photofan731]

Thanks for reply

i am using macOSHighSierra 

version 10.13.6

MacBook Pro 3 GHzIntel Core i7

8 GB 1600 MHZ DDR3

Intel graphics 1536 MB

Photoshop 2020 21.2.0 release

[photofan731 · Accepted solution]

Thanks for your help, I reset the Preferences and all good now.

Cheers