High-speed display in R6

[alvinguo]

Hello, I am using R6 with my EF 70-200 is ii lens and official adapter. However, High Speed Display is not available with EF lens even with adapter. Is there any way I can work around it beside buying another RF lens? I shoot sports so this feature is crucial to me. 

[Waddizzle]

There are a handful caveats associated with using High Speed Display.  The camera must be set for one of the Creative shooting modes.  The are limits on the range of aperture values and shutter speeds that you can use, and more.

The full user guide lists all of them.  Download the PDF and search for “high speed display”.