This message was posted on behalf of Intel Corporation
I understand that you are looking for the dedicated memory for the graphics controller.
This option is found in the BIOS of your system, it comes in different values, 128MB, 256MB, 512MB. This all depends on the motherboard manufacturer, in this case it would be Acer*. You can always contact them directly so they can show you and explain how to change this option if possible.
As a reference, here is an article with frequently asked questions about Intel ® Graphics:
Intel ® Graphics Memory FAQ
I hope this helps.