From Dwarf Fortress Wiki
About key symbols
Most documents on the wiki use key symbols that look liketo indicate what keys are used for an operation. Note that these are case sensitive. In order to save space, + will be written as . So means "press the 't' key without the shift key" and means "hold down shift and press the 't' key". Lowercase and uppercase keys will almost never perform the same function, so it is important to use the correct key. Sequences of keys will be written with dashes between them. So - - means "press 'a', then press 'b', then hold shift and press 'c'".
|Go back to the previous screen/menu|
|Change active menu option or move cursor|
|Alternate menu selection keys|
|Select menu option|
Sometimes you use the directional keysand to make menu selections, but sometimes you will need to use the alternate selection keys ( and ) instead. Generally speaking, if the directional keys don't work in a menu, try / .
will almost always take you back to the previous screen until you get to the top level of the UI, at which point it will display the options menu.