Going to the start button,  right clicking on my computer...

Going to the start button,  right clicking on my computer and then left clicking on properties, going to the advanced tab, click on settings under preformance and then clicking on the advanced tab brings up three options, one of  which is virtual memory. Mine is currently set for 765 MB. The memory is set to system managed size. I was wondering if it’s better to let the computer hand the amount of memory or set the option to custom size?