Please Login or Register to enable full access to viewing & posting
The VST instrument is designed to automatically hide itself when not needed. I don't remember the exact threshold, but once you are close enough to an altitude change that your required vertical speed to reach the target exceeds a certain limit (maybe 100 feet per minute, in English units?), then it will appear.
I don't think there's an option to force the VST instrument to always be visible.
When I add an instrument, it's always to a customizatized layout I have already done. So, I load that one, and don't restore the default layout.