Also, you can enter a location name with a displacement:
name+5
And finally you can specify a relative address:
+10 0x10 bytes further
-5 5 bytes backwards
Special addresses:
$ - current location (depends on the current assembler)
Examples:
456 current segment, offset 0x456
5E current segment, offset 0x5E
3000:34 segment 0x3000, offset 0x34
ds:67 segment pointed by ds, offset 0x67
start a location with name 'start'