your character on top of an item or container and select "Get" from
the "Action" menu. The item or contents of the container will be shown
in the "Get" window. You then click on the up arrow next to each item
name to pick up that item. If there are multiple items present, like 10 heal
potions, then the default will be to pick up all of them. Option clicking on
the item's up arrow will allow you to enter the quantity that you want to pick
can also pick up all of the items you are standing on by choosing "Get
All" from the "Action" menu (Command-A).