This message was posted on behalf of Intel Corporation
In most cases, the computer manufacturer has already configured the system to use the maximum amount of graphics memory that is possible for your particular computer model. Sometimes you can change these values through BIOS level but for some others, the BIOS does not provide options to control dynamic video memory.
Check with your computer manufacturer if there are tips on increasing the amount of graphics memory for your computer model.
If you are interested in additional information about Dynamic video memory: http://www.intel.com/content/www/us/en/support/graphics-drivers/000005539.html