Acer AR180 F1 - Manual (Page 68)

3 System upgrades 50
1 Remove the memory module.
a Press the holding clips on both sides of the DIMM slot outward to
release the DIMM (1).
b Gently pull the DIMM upward to remove it from the DIMM slot (2).
2 If you intend to install a new memory module, refer to the
previous section.
To reconfigure the system memory:
The system automatically detects the amount of memory installed. Run
the BIOS setup to view the new value for total system memory and
make a note of it.