How can I increase the amount of VRAM via BIOS settings on a HP Envy laptop with 1 GB video memory

[jr0410]

Because my HP laptop has 1 GB of integrated VRAM, I can only increase the VRAM by changing BIOS settings. I don't know how to do it. What keyboard key do I tap in order to get to the Bios settings on my HP motherboard? Is it  ESC, DEL, F5,F6,F10 ?????

Does HP have a site that would have an automatic way to increase VRAM? 

I need at least 2GB of VRAM so that my grandson can run Flight Simulator.

HELP! 

[banhien]

@jr0410 

allocate/assign spare/available system RAM to VRAM automatically when required up to max limit. System will also take VRAM back when required (the number is dynamic, not fix). During the good old days, we could do this from BIOS but now OS is smarter.

The following document shows Max shared RAM for Intel iGPU versions

                      https://www.intel.com/content/www/us/en/support/articles/000020962/graphics-drivers.html

Note: Recently people post Youtube on internet saying they can change using Regedit. Many people try but the results are unpredictable.

Regards