Here is how to change the settings from Windows on the device (assuming the original Acer software is installed)
On an ACER Aspire Z3771. Similar to the previous answer. Try the following:
on the left of the date stamp ( located on the lower right corner of the screen ) you'll see a small up-pointing triangle .
Left click on the triangle and , hover the mouse over the items until you find : Intel ( R ) HD graphics icon. Left click on the icon.
You should see: INTEL GRAPHICS and MEDIA COTROL PANEL, also the Intel Logo.
From the menu above the Panel, select GRAPHICS PROPERTIES … by a left click on it.
Select one of the following APPLICATION MODE : BASIC MODE ( click on the corresponding circle on the left and you should see a dot into ). Click OK.
On the new opened Panel, below DISPLAY is a COLOR ENHANCEMENT with 2 right - pointing triangles. Left click on it. Move the cursors ( dots ) by clicking on each of the 5 options , and holding then moving to the right-left as you wish , until you reach the desired display brightness ( uncheck the PREVIEW - if you want to and record the figures beside each adjustment for future reference ) and , finally click OK.
Follow the same steps if you want to RESET or just left-click on RESTORE DEFAULTS to have the factory settings.