mnemonic = "char";
Specify which tile has the focus when the user presses a key.
This attribute determines which tile receives the focus when the user presses a key. The character specified by the mnemonic attribute must exactly match a letter found in the tile's label attribute, including capitalization, as shown in the examples below. However, the user may enter either upper- or lower-case letters when using mnemonics. The mnemonic character need not be unique in the dialog box, allow the user to cycle through tiles with similar functions.
char: a character in the label of the tile.
Examples:
label = "3D View";
mnemonic = "3";
label = "Line";
mnemonic = "L";
label = "Donut";
mnemonic = "o";
Valid Tiles