How to Enable SpeedScreen in Web Interface 5.3
Modify the Template.ica file or default.ica with the following information
In Web Interface 5.3
Edit the default.ica file located \Inetpub\wwwroot\Citrix\XenApp\conf
In the [Application] section, add:
Now, when you open ICA Connection Center, you see SpeedScreen Latency Reduction = ON.
Make Sure that Speedscreen Latency Reduction is enabled on the Server side, as well.