Folks,
I made a change in ArcGIS Pro 3.5.3 related to the Rendering Engine. Originally, I was using DirectX 12, but I switched to DirectX 11 and restarted ArcGIS Pro. After doing this, I can now copy and paste text elements in Layout mode without any delay.
ChatGPT 5 suggested using DirectX 12 only if you have a more recent computer (mine is a Dell Precision Tower 5810). That led me to try switching to DirectX 11, which is recommended for slightly older workstations when you’re looking for maximum stability.
This change noticeably improved the speed when working in Layout mode. Give it a try, it might solve the lag issue for you too.
Mjss25